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99999431 = 731345641
BaseRepresentation
bin1011111010111…
…01111011000111
320222011111102122
411331131323013
5201044440211
613531200155
72322660350
oct575357307
9228144378
1099999431
11514a1064
12295a605b
131794347c
14d3d0d27
158ba46db
hex5f5dec7

99999431 has 8 divisors (see below), whose sum is σ = 114652704. Its totient is φ = 85438080.

The previous prime is 99999401. The next prime is 99999437. The reversal of 99999431 is 13499999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2k-99999431 is a prime.

It is a super-2 number, since 2×999994312 = 19999772400647522, which contains 22 as substring.

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 (99999437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20630 + ... + 25011.

It is an arithmetic number, because the mean of its divisors is an integer number (14331588).

Almost surely, 299999431 is an apocalyptic number.

99999431 is a deficient number, since it is larger than the sum of its proper divisors (14653273).

99999431 is a wasteful number, since it uses less digits than its factorization.

99999431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45961.

The product of its digits is 708588, while the sum is 53.

The square root of 99999431 is about 9999.9715499595. The cubic root of 99999431 is about 464.1580030049.

The spelling of 99999431 in words is "ninety-nine million, nine hundred ninety-nine thousand, four hundred thirty-one".

Divisors: 1 7 313 2191 45641 319487 14285633 99999431