99904513 has 2 divisors, whose sum is σ = 99904514. Its totient is φ = 99904512.

The previous prime is 99904501. The next prime is 99904531. The reversal of 99904513 is 31540999.

Together with next prime (99904531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65658609 + 34245904 = 8103^2 + 5852^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99904513 is a prime.

It is not a weakly prime, because it can be changed into another prime (99904573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49952256 + 49952257.

It is an arithmetic number, because the mean of its divisors is an integer number (49952257).

Almost surely, 2^99904513 is an apocalyptic number.

It is an amenable number.

99904513 is a deficient number, since it is larger than the sum of its proper divisors (1).

99904513 is an equidigital number, since it uses as much as digits as its factorization.

99904513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 99904513 is about 9995.2245097346. The cubic root of 99904513 is about 464.0110991821.

The spelling of 99904513 in words is "ninety-nine million, nine hundred four thousand, five hundred thirteen".