99992539 has 2 divisors, whose sum is σ = 99992540. Its totient is φ = 99992538.

The previous prime is 99992533. The next prime is 99992617. The reversal of 99992539 is 93529999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99992539 - 2⁹ = 99992027 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99992539.

It is not a weakly prime, because it can be changed into another prime (99992533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49996269 + 49996270.

It is an arithmetic number, because the mean of its divisors is an integer number (49996270).

Almost surely, 2^99992539 is an apocalyptic number.

99992539 is a deficient number, since it is larger than the sum of its proper divisors (1).

99992539 is an equidigital number, since it uses as much as digits as its factorization.

99992539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1771470, while the sum is 55.

The square root of 99992539 is about 9999.6269430414. The cubic root of 99992539 is about 464.1473394427.

The spelling of 99992539 in words is "ninety-nine million, nine hundred ninety-two thousand, five hundred thirty-nine".