3997585131 has 4 divisors (see below), whose sum is σ = 5330113512. Its totient is φ = 2665056752.

The previous prime is 3997585087. The next prime is 3997585147. The reversal of 3997585131 is 1315857993.

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 3997585131 - 2²² = 3993390827 is a prime.

It is a super-2 number, since 2×3997585131² = 31961373759184574322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3997585231) 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, 666264186 + ... + 666264191.

It is an arithmetic number, because the mean of its divisors is an integer number (1332528378).

Almost surely, 2^3997585131 is an apocalyptic number.

3997585131 is a deficient number, since it is larger than the sum of its proper divisors (1332528381).

3997585131 is a wasteful number, since it uses less digits than its factorization.

3997585131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332528380.

The product of its digits is 1020600, while the sum is 51.

The square root of 3997585131 is about 63226.4591053461. The cubic root of 3997585131 is about 1587.0815405288.

The spelling of 3997585131 in words is "three billion, nine hundred ninety-seven million, five hundred eighty-five thousand, one hundred thirty-one".