3989772531 has 32 divisors (see below), whose sum is σ = 6096824640. Its totient is φ = 2609586720.

The previous prime is 3989772529. The next prime is 3989772557. The reversal of 3989772531 is 1352779893.

3989772531 is a `hidden beast` number, since 39 + 8 + 9 + 7 + 72 + 531 = 666.

It is not a de Polignac number, because 3989772531 - 2¹ = 3989772529 is a prime.

It is a super-2 number, since 2×3989772531² = 31836569698244291922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3989772511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98701 + ... + 133121.

It is an arithmetic number, because the mean of its divisors is an integer number (190525770).

Almost surely, 2^3989772531 is an apocalyptic number.

3989772531 is a deficient number, since it is larger than the sum of its proper divisors (2107052109).

3989772531 is an frugal number, since it uses more digits than its factorization.

3989772531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34495 (or 34477 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 54.

The square root of 3989772531 is about 63164.6462113103. The cubic root of 3989772531 is about 1586.0469726571.

The spelling of 3989772531 in words is "three billion, nine hundred eighty-nine million, seven hundred seventy-two thousand, five hundred thirty-one".