99439237 has 2 divisors, whose sum is σ = 99439238. Its totient is φ = 99439236.

The previous prime is 99439201. The next prime is 99439243. The reversal of 99439237 is 73293499.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98386561 + 1052676 = 9919^2 + 1026^2 .

It is a cyclic number.

It is not a de Polignac number, because 99439237 - 2¹⁵ = 99406469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99439267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49719618 + 49719619.

It is an arithmetic number, because the mean of its divisors is an integer number (49719619).

Almost surely, 2^99439237 is an apocalyptic number.

It is an amenable number.

99439237 is a deficient number, since it is larger than the sum of its proper divisors (1).

99439237 is an equidigital number, since it uses as much as digits as its factorization.

99439237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 367416, while the sum is 46.

The square root of 99439237 is about 9971.9224325102. The cubic root of 99439237 is about 463.2896461176.

The spelling of 99439237 in words is "ninety-nine million, four hundred thirty-nine thousand, two hundred thirty-seven".