99542557 has 2 divisors, whose sum is σ = 99542558. Its totient is φ = 99542556.

The previous prime is 99542507. The next prime is 99542563. The reversal of 99542557 is 75524599.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98128836 + 1413721 = 9906^2 + 1189^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99542557 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99542507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49771278 + 49771279.

It is an arithmetic number, because the mean of its divisors is an integer number (49771279).

Almost surely, 2^99542557 is an apocalyptic number.

It is an amenable number.

99542557 is a deficient number, since it is larger than the sum of its proper divisors (1).

99542557 is an equidigital number, since it uses as much as digits as its factorization.

99542557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 567000, while the sum is 46.

The square root of 99542557 is about 9977.1016332400. The cubic root of 99542557 is about 463.4500473128.

The spelling of 99542557 in words is "ninety-nine million, five hundred forty-two thousand, five hundred fifty-seven".