99538831 has 4 divisors (see below), whose sum is σ = 113758672. Its totient is φ = 85318992.

The previous prime is 99538807. The next prime is 99538849. The reversal of 99538831 is 13883599.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13883599 = 191 ⋅72689.

It is a cyclic number.

It is not a de Polignac number, because 99538831 - 2¹¹ = 99536783 is a prime.

It is a super-2 number, since 2×99538831² = 19815957753693122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99538801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7109910 + ... + 7109923.

It is an arithmetic number, because the mean of its divisors is an integer number (28439668).

Almost surely, 2^99538831 is an apocalyptic number.

99538831 is a deficient number, since it is larger than the sum of its proper divisors (14219841).

99538831 is a wasteful number, since it uses less digits than its factorization.

99538831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14219840.

The product of its digits is 233280, while the sum is 46.

The square root of 99538831 is about 9976.9149039169. The cubic root of 99538831 is about 463.4442647394. Note that the first 3 decimals are identical.

The spelling of 99538831 in words is "ninety-nine million, five hundred thirty-eight thousand, eight hundred thirty-one".