99902439 has 48 divisors (see below), whose sum is σ = 178726912. Its totient is φ = 52363584.

The previous prime is 99902393. The next prime is 99902441. The reversal of 99902439 is 93420999.

It is not a de Polignac number, because 99902439 - 2⁷ = 99902311 is a prime.

99902439 is a modest number, since divided by 2439 gives 999 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 99902394 and 99902403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99902039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 182364 + ... + 182910.

Almost surely, 2^99902439 is an apocalyptic number.

99902439 is a deficient number, since it is larger than the sum of its proper divisors (78824473).

99902439 is a wasteful number, since it uses less digits than its factorization.

99902439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796 (or 793 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 45.

The square root of 99902439 is about 9995.1207596507. The cubic root of 99902439 is about 464.0078882304.

The spelling of 99902439 in words is "ninety-nine million, nine hundred two thousand, four hundred thirty-nine".