99770131 has 4 divisors (see below), whose sum is σ = 99800064. Its totient is φ = 99740200.

The previous prime is 99770129. The next prime is 99770141. The reversal of 99770131 is 13107799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13107799 = 17 ⋅771047.

It is a cyclic number.

It is not a de Polignac number, because 99770131 - 2¹ = 99770129 is a prime.

It is a super-2 number, since 2×99770131² = 19908158079514322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99770101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9235 + ... + 16876.

It is an arithmetic number, because the mean of its divisors is an integer number (24950016).

Almost surely, 2^99770131 is an apocalyptic number.

99770131 is a deficient number, since it is larger than the sum of its proper divisors (29933).

99770131 is a wasteful number, since it uses less digits than its factorization.

99770131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29932.

The product of its (nonzero) digits is 11907, while the sum is 37.

The square root of 99770131 is about 9988.4999374280. The cubic root of 99770131 is about 463.8029580399.

The spelling of 99770131 in words is "ninety-nine million, seven hundred seventy thousand, one hundred thirty-one".