3918897 has 18 divisors (see below), whose sum is σ = 5805618. Its totient is φ = 2547072.

The previous prime is 3918881. The next prime is 3918899. The reversal of 3918897 is 7988193.

It can be written as a sum of positive squares in only one way, i.e., 3272481 + 646416 = 1809^2 + 804^2 .

It is not a de Polignac number, because 3918897 - 2⁴ = 3918881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3918899) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 40353 + ... + 40449.

Almost surely, 2^3918897 is an apocalyptic number.

It is an amenable number.

3918897 is a deficient number, since it is larger than the sum of its proper divisors (1886721).

3918897 is an equidigital number, since it uses as much as digits as its factorization.

3918897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237 (or 167 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 3918897 is about 1979.6204181610. The cubic root of 3918897 is about 157.6599131675.

The spelling of 3918897 in words is "three million, nine hundred eighteen thousand, eight hundred ninety-seven".