99715537 has 2 divisors, whose sum is σ = 99715538. Its totient is φ = 99715536.

The previous prime is 99715519. The next prime is 99715579. The reversal of 99715537 is 73551799.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95238081 + 4477456 = 9759^2 + 2116^2 .

It is a cyclic number.

It is not a de Polignac number, because 99715537 - 2¹¹ = 99713489 is a prime.

It is equal to p_5745997 and since 99715537 and 5745997 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (99715507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49857768 + 49857769.

It is an arithmetic number, because the mean of its divisors is an integer number (49857769).

Almost surely, 2^99715537 is an apocalyptic number.

It is an amenable number.

99715537 is a deficient number, since it is larger than the sum of its proper divisors (1).

99715537 is an equidigital number, since it uses as much as digits as its factorization.

99715537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 297675, while the sum is 46.

The square root of 99715537 is about 9985.7667206880. The cubic root of 99715537 is about 463.7183452794.

The spelling of 99715537 in words is "ninety-nine million, seven hundred fifteen thousand, five hundred thirty-seven".