99980131 has 4 divisors (see below), whose sum is σ = 101010952. Its totient is φ = 98949312.

The previous prime is 99980123. The next prime is 99980137. The reversal of 99980131 is 13108999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13108999 = 167 ⋅78497.

It is not a de Polignac number, because 99980131 - 2³ = 99980123 is a prime.

It is a super-2 number, since 2×99980131² = 19992053189554322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99980137) 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, 515265 + ... + 515458.

It is an arithmetic number, because the mean of its divisors is an integer number (25252738).

Almost surely, 2^99980131 is an apocalyptic number.

99980131 is a deficient number, since it is larger than the sum of its proper divisors (1030821).

99980131 is a wasteful number, since it uses less digits than its factorization.

99980131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030820.

The product of its (nonzero) digits is 17496, while the sum is 40.

The square root of 99980131 is about 9999.0065006480. The cubic root of 99980131 is about 464.1281400822.

The spelling of 99980131 in words is "ninety-nine million, nine hundred eighty thousand, one hundred thirty-one".