3987532931 has 4 divisors (see below), whose sum is σ = 4160903952. Its totient is φ = 3814161912.

The previous prime is 3987532921. The next prime is 3987532961. The reversal of 3987532931 is 1392357893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1392357893 = 16883 ⋅82471.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3987532931 is a prime.

It is a super-2 number, since 2×3987532931² = 31800837751618901522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3987532931.

It is not an unprimeable number, because it can be changed into a prime (3987532921) 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, 86685476 + ... + 86685521.

It is an arithmetic number, because the mean of its divisors is an integer number (1040225988).

Almost surely, 2^3987532931 is an apocalyptic number.

3987532931 is a deficient number, since it is larger than the sum of its proper divisors (173371021).

3987532931 is a wasteful number, since it uses less digits than its factorization.

3987532931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173371020.

The product of its digits is 1224720, while the sum is 50.

The square root of 3987532931 is about 63146.9154511921. The cubic root of 3987532931 is about 1585.7501490813.

The spelling of 3987532931 in words is "three billion, nine hundred eighty-seven million, five hundred thirty-two thousand, nine hundred thirty-one".