99680139 has 40 divisors (see below), whose sum is σ = 161553392. Its totient is φ = 60886080.

The previous prime is 99680131. The next prime is 99680177. The reversal of 99680139 is 93108699.

It is not a de Polignac number, because 99680139 - 2³ = 99680131 is a prime.

It is a super-2 number, since 2×99680139² = 19872260222118642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 99680094 and 99680103.

It is not an unprimeable number, because it can be changed into a prime (99680131) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 190332 + ... + 190854.

Almost surely, 2^99680139 is an apocalyptic number.

99680139 is a deficient number, since it is larger than the sum of its proper divisors (61873253).

99680139 is a wasteful number, since it uses less digits than its factorization.

99680139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729 (or 720 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 99680139 is about 9983.9941406233. The cubic root of 99680139 is about 463.6634670220.

The spelling of 99680139 in words is "ninety-nine million, six hundred eighty thousand, one hundred thirty-nine".