99865039 has 2 divisors, whose sum is σ = 99865040. Its totient is φ = 99865038.

The previous prime is 99865033. The next prime is 99865061. The reversal of 99865039 is 93056899.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99865039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99864983 and 99865001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99865033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49932519 + 49932520.

It is an arithmetic number, because the mean of its divisors is an integer number (49932520).

Almost surely, 2^99865039 is an apocalyptic number.

99865039 is a deficient number, since it is larger than the sum of its proper divisors (1).

99865039 is an equidigital number, since it uses as much as digits as its factorization.

99865039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 524880, while the sum is 49.

The square root of 99865039 is about 9993.2496716534. The cubic root of 99865039 is about 463.9499781960.

The spelling of 99865039 in words is "ninety-nine million, eight hundred sixty-five thousand, thirty-nine".