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99999973 = 472127659
BaseRepresentation
bin1011111010111…
…10000011100101
320222011112011201
411331132003211
5201044444343
613531202501
72322662053
oct575360345
9228145151
1099999973
11514a1507
12295a6431
13179437a8
14d3d11d3
158ba494d
hex5f5e0e5

99999973 has 4 divisors (see below), whose sum is σ = 102127680. Its totient is φ = 97872268.

The previous prime is 99999971. The next prime is 99999989. The reversal of 99999973 is 37999999.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37999999 = 371027027.

It is a cyclic number.

It is not a de Polignac number, because 99999973 - 21 = 99999971 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99999971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1063783 + ... + 1063876.

It is an arithmetic number, because the mean of its divisors is an integer number (25531920).

Almost surely, 299999973 is an apocalyptic number.

It is an amenable number.

99999973 is a deficient number, since it is larger than the sum of its proper divisors (2127707).

99999973 is a wasteful number, since it uses less digits than its factorization.

99999973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2127706.

The product of its digits is 11160261, while the sum is 64.

The square root of 99999973 is about 9999.9986499999. The cubic root of 99999973 is about 464.1588415870.

It can be divided in two parts, 9999997 and 3, that added together give a 7-th power (10000000 = 107).

The spelling of 99999973 in words is "ninety-nine million, nine hundred ninety-nine thousand, nine hundred seventy-three".

Divisors: 1 47 2127659 99999973