3957399 has 12 divisors (see below), whose sum is σ = 5752656. Its totient is φ = 2621472.

The previous prime is 3957397. The next prime is 3957431. The reversal of 3957399 is 9937593.

It is not a de Polignac number, because 3957399 - 2¹ = 3957397 is a prime.

It is a super-2 number, since 2×3957399² = 31322013690402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3957397) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 187 + ... + 2819.

It is an arithmetic number, because the mean of its divisors is an integer number (479388).

Almost surely, 2^3957399 is an apocalyptic number.

3957399 is a deficient number, since it is larger than the sum of its proper divisors (1795257).

3957399 is a wasteful number, since it uses less digits than its factorization.

3957399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2806 (or 2803 counting only the distinct ones).

The product of its digits is 229635, while the sum is 45.

The square root of 3957399 is about 1989.3212410267. The cubic root of 3957399 is about 158.1745520570.

It can be divided in two parts, 3957 and 399, that added together give a square (4356 = 66²).

The spelling of 3957399 in words is "three million, nine hundred fifty-seven thousand, three hundred ninety-nine".