3897971 has 32 divisors (see below), whose sum is σ = 5308416. Its totient is φ = 2772000.

The previous prime is 3897967. The next prime is 3897973. The reversal of 3897971 is 1797983.

It is not a de Polignac number, because 3897971 - 2² = 3897967 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3897973) 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, 54866 + ... + 54936.

It is an arithmetic number, because the mean of its divisors is an integer number (165888).

Almost surely, 2^3897971 is an apocalyptic number.

3897971 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

3897971 is a deficient number, since it is larger than the sum of its proper divisors (1410445).

3897971 is a wasteful number, since it uses less digits than its factorization.

3897971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143.

The product of its digits is 95256, while the sum is 44.

The square root of 3897971 is about 1974.3279869363. The cubic root of 3897971 is about 157.3787897519.

The spelling of 3897971 in words is "three million, eight hundred ninety-seven thousand, nine hundred seventy-one".