3974999131 has 2 divisors, whose sum is σ = 3974999132. Its totient is φ = 3974999130.

The previous prime is 3974999129. The next prime is 3974999137. The reversal of 3974999131 is 1319994793.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3974999131 - 2¹ = 3974999129 is a prime.

It is a super-2 number, since 2×3974999131² = 31601236182901510322, which contains 22 as substring.

Together with 3974999129, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3974999137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1987499565 + 1987499566.

It is an arithmetic number, because the mean of its divisors is an integer number (1987499566).

Almost surely, 2^3974999131 is an apocalyptic number.

3974999131 is a deficient number, since it is larger than the sum of its proper divisors (1).

3974999131 is an equidigital number, since it uses as much as digits as its factorization.

3974999131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1653372, while the sum is 55.

The square root of 3974999131 is about 63047.5941729738. The cubic root of 3974999131 is about 1584.0869372230.

The spelling of 3974999131 in words is "three billion, nine hundred seventy-four million, nine hundred ninety-nine thousand, one hundred thirty-one".