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99998881 = 199775387
BaseRepresentation
bin1011111010111…
…01110010100001
320222011110200021
411331131302201
5201044431011
613531153441
72322655633
oct575356241
9228143607
1099998881
11514a0704
12295a5881
1317943148
14d3d0a53
158ba4471
hex5f5dca1

99998881 has 8 divisors (see below), whose sum is σ = 105389280. Its totient is φ = 94621248.

The previous prime is 99998869. The next prime is 99998891. The reversal of 99998881 is 18889999.

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

It is a cyclic number.

It is not a de Polignac number, because 99998881 - 211 = 99996833 is a prime.

It is a super-2 number, since 2×999988812 = 19999552402504322, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (99998851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15870 + ... + 21256.

It is an arithmetic number, because the mean of its divisors is an integer number (13173660).

Almost surely, 299998881 is an apocalyptic number.

It is an amenable number.

99998881 is a deficient number, since it is larger than the sum of its proper divisors (5390399).

99998881 is a wasteful number, since it uses less digits than its factorization.

99998881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6383.

The product of its digits is 3359232, while the sum is 61.

The square root of 99998881 is about 9999.9440498435. The cubic root of 99998881 is about 464.1571520422.

The spelling of 99998881 in words is "ninety-nine million, nine hundred ninety-eight thousand, eight hundred eighty-one".

Divisors: 1 19 977 5387 18563 102353 5263099 99998881