3897531 has 24 divisors (see below), whose sum is σ = 6352080. Its totient is φ = 2360160.

The previous prime is 3897521. The next prime is 3897559. The reversal of 3897531 is 1357983.

3897531 is a `hidden beast` number, since 38 + 97 + 531 = 666.

It is not a de Polignac number, because 3897531 - 2⁵ = 3897499 is a prime.

It is a super-2 number, since 2×3897531² = 30381495791922, which contains 22 as substring.

3897531 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3897521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2671 + ... + 3863.

It is an arithmetic number, because the mean of its divisors is an integer number (264670).

Almost surely, 2^3897531 is an apocalyptic number.

3897531 is a deficient number, since it is larger than the sum of its proper divisors (2454549).

3897531 is a wasteful number, since it uses less digits than its factorization.

3897531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224 (or 1207 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 3897531 is about 1974.2165534713. The cubic root of 3897531 is about 157.3728679297.

The spelling of 3897531 in words is "three million, eight hundred ninety-seven thousand, five hundred thirty-one".