986131931 has 4 divisors (see below), whose sum is σ = 988707072. Its totient is φ = 983556792.

The previous prime is 986131919. The next prime is 986131981. The reversal of 986131931 is 139131689.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 986131931 - 2²⁶ = 919023067 is a prime.

It is a super-2 number, since 2×986131931² = 1944912370675577522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (986131981) 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, 1286996 + ... + 1287761.

It is an arithmetic number, because the mean of its divisors is an integer number (247176768).

Almost surely, 2^986131931 is an apocalyptic number.

986131931 is a deficient number, since it is larger than the sum of its proper divisors (2575141).

986131931 is a wasteful number, since it uses less digits than its factorization.

986131931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2575140.

The product of its digits is 34992, while the sum is 41.

The square root of 986131931 is about 31402.7376354355. The cubic root of 986131931 is about 995.3557748967.

The spelling of 986131931 in words is "nine hundred eighty-six million, one hundred thirty-one thousand, nine hundred thirty-one".