99402539 has 2 divisors, whose sum is σ = 99402540. Its totient is φ = 99402538.

The previous prime is 99402533. The next prime is 99402557. The reversal of 99402539 is 93520499.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99402539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99402496 and 99402505.

It is not a weakly prime, because it can be changed into another prime (99402533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49701269 + 49701270.

It is an arithmetic number, because the mean of its divisors is an integer number (49701270).

Almost surely, 2^99402539 is an apocalyptic number.

99402539 is a deficient number, since it is larger than the sum of its proper divisors (1).

99402539 is an equidigital number, since it uses as much as digits as its factorization.

99402539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87480, while the sum is 41.

The square root of 99402539 is about 9970.0821962509. The cubic root of 99402539 is about 463.2326468355.

The spelling of 99402539 in words is "ninety-nine million, four hundred two thousand, five hundred thirty-nine".