99397637 has 2 divisors, whose sum is σ = 99397638. Its totient is φ = 99397636.

The previous prime is 99397619. The next prime is 99397667. The reversal of 99397637 is 73679399.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98922916 + 474721 = 9946^2 + 689^2 .

It is a cyclic number.

It is not a de Polignac number, because 99397637 - 2¹⁰ = 99396613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99397667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49698818 + 49698819.

It is an arithmetic number, because the mean of its divisors is an integer number (49698819).

Almost surely, 2^99397637 is an apocalyptic number.

It is an amenable number.

99397637 is a deficient number, since it is larger than the sum of its proper divisors (1).

99397637 is an equidigital number, since it uses as much as digits as its factorization.

99397637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1928934, while the sum is 53.

The square root of 99397637 is about 9969.8363577343. The cubic root of 99397637 is about 463.2250319939.

It can be divided in two parts, 9939 and 7637, that added together give a cube (17576 = 26³).

The spelling of 99397637 in words is "ninety-nine million, three hundred ninety-seven thousand, six hundred thirty-seven".