3897997 has 4 divisors (see below), whose sum is σ = 3906880. Its totient is φ = 3889116.

The previous prime is 3897973. The next prime is 3898001. The reversal of 3897997 is 7997983.

3897997 is nontrivially palindromic in base 9.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7997983 = 7 ⋅1142569.

It is a cyclic number.

It is not a de Polignac number, because 3897997 - 2¹¹ = 3895949 is a prime.

It is a super-2 number, since 2×3897997² = 30388761224018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3897937) 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, 3747 + ... + 4672.

It is an arithmetic number, because the mean of its divisors is an integer number (976720).

Almost surely, 2^3897997 is an apocalyptic number.

It is an amenable number.

3897997 is a deficient number, since it is larger than the sum of its proper divisors (8883).

3897997 is an equidigital number, since it uses as much as digits as its factorization.

3897997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8882.

The product of its digits is 857304, while the sum is 52.

The square root of 3897997 is about 1974.3345714443. The cubic root of 3897997 is about 157.3791396638.

The spelling of 3897997 in words is "three million, eight hundred ninety-seven thousand, nine hundred ninety-seven".