99390553 has 2 divisors, whose sum is σ = 99390554. Its totient is φ = 99390552.

The previous prime is 99390527. The next prime is 99390563. The reversal of 99390553 is 35509399.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91623184 + 7767369 = 9572^2 + 2787^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99390553 is a prime.

It is not a weakly prime, because it can be changed into another prime (99390563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49695276 + 49695277.

It is an arithmetic number, because the mean of its divisors is an integer number (49695277).

Almost surely, 2^99390553 is an apocalyptic number.

It is an amenable number.

99390553 is a deficient number, since it is larger than the sum of its proper divisors (1).

99390553 is an equidigital number, since it uses as much as digits as its factorization.

99390553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 164025, while the sum is 43.

The square root of 99390553 is about 9969.4810797754. The cubic root of 99390553 is about 463.2140271579.

The spelling of 99390553 in words is "ninety-nine million, three hundred ninety thousand, five hundred fifty-three".