99551537 has 2 divisors, whose sum is σ = 99551538. Its totient is φ = 99551536.

The previous prime is 99551527. The next prime is 99551561. The reversal of 99551537 is 73515599.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61716736 + 37834801 = 7856^2 + 6151^2 .

It is a cyclic number.

It is not a de Polignac number, because 99551537 - 2⁸ = 99551281 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99551527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49775768 + 49775769.

It is an arithmetic number, because the mean of its divisors is an integer number (49775769).

Almost surely, 2^99551537 is an apocalyptic number.

It is an amenable number.

99551537 is a deficient number, since it is larger than the sum of its proper divisors (1).

99551537 is an equidigital number, since it uses as much as digits as its factorization.

99551537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 212625, while the sum is 44.

The square root of 99551537 is about 9977.5516535872. The cubic root of 99551537 is about 463.4639832494.

The spelling of 99551537 in words is "ninety-nine million, five hundred fifty-one thousand, five hundred thirty-seven".