99593881 has 2 divisors, whose sum is σ = 99593882. Its totient is φ = 99593880.

The previous prime is 99593873. The next prime is 99593903. The reversal of 99593881 is 18839599.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68624656 + 30969225 = 8284^2 + 5565^2 .

It is a cyclic number.

It is not a de Polignac number, because 99593881 - 2³ = 99593873 is a prime.

It is a super-2 number, since 2×99593881² = 19837882265284322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99593861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49796940 + 49796941.

It is an arithmetic number, because the mean of its divisors is an integer number (49796941).

Almost surely, 2^99593881 is an apocalyptic number.

It is an amenable number.

99593881 is a deficient number, since it is larger than the sum of its proper divisors (1).

99593881 is an equidigital number, since it uses as much as digits as its factorization.

99593881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 699840, while the sum is 52.

The square root of 99593881 is about 9979.6733914492. The cubic root of 99593881 is about 463.5296850212.

The spelling of 99593881 in words is "ninety-nine million, five hundred ninety-three thousand, eight hundred eighty-one".