99530881 has 2 divisors, whose sum is σ = 99530882. Its totient is φ = 99530880.

The previous prime is 99530791. The next prime is 99530891. The reversal of 99530881 is 18803599.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94400656 + 5130225 = 9716^2 + 2265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99530881 is a prime.

It is a super-2 number, since 2×99530881² = 19812792545272322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99530891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49765440 + 49765441.

It is an arithmetic number, because the mean of its divisors is an integer number (49765441).

Almost surely, 2^99530881 is an apocalyptic number.

It is an amenable number.

99530881 is a deficient number, since it is larger than the sum of its proper divisors (1).

99530881 is an equidigital number, since it uses as much as digits as its factorization.

99530881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 99530881 is about 9976.5164762055. The cubic root of 99530881 is about 463.4319262381.

The spelling of 99530881 in words is "ninety-nine million, five hundred thirty thousand, eight hundred eighty-one".