99510889 has 2 divisors, whose sum is σ = 99510890. Its totient is φ = 99510888.

The previous prime is 99510883. The next prime is 99510893. The reversal of 99510889 is 98801599.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98664489 + 846400 = 9933^2 + 920^2 .

It is a cyclic number.

It is not a de Polignac number, because 99510889 - 2²¹ = 97413737 is a prime.

It is not a weakly prime, because it can be changed into another prime (99510883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49755444 + 49755445.

It is an arithmetic number, because the mean of its divisors is an integer number (49755445).

Almost surely, 2^99510889 is an apocalyptic number.

It is an amenable number.

99510889 is a deficient number, since it is larger than the sum of its proper divisors (1).

99510889 is an equidigital number, since it uses as much as digits as its factorization.

99510889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 49.

The square root of 99510889 is about 9975.5144729482. The cubic root of 99510889 is about 463.4008954954.

The spelling of 99510889 in words is "ninety-nine million, five hundred ten thousand, eight hundred eighty-nine".