3999957 has 8 divisors (see below), whose sum is σ = 5743584. Its totient is φ = 2461488.

The previous prime is 3999949. The next prime is 3999971. The reversal of 3999957 is 7599993.

3999957 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3999957 - 2³ = 3999949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3999917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51243 + ... + 51320.

It is an arithmetic number, because the mean of its divisors is an integer number (717948).

Almost surely, 2^3999957 is an apocalyptic number.

It is an amenable number.

3999957 is a deficient number, since it is larger than the sum of its proper divisors (1743627).

3999957 is a wasteful number, since it uses less digits than its factorization.

3999957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102579.

The product of its digits is 688905, while the sum is 51.

The square root of 3999957 is about 1999.9892499711. The cubic root of 3999957 is about 158.7395363761.

The spelling of 3999957 in words is "three million, nine hundred ninety-nine thousand, nine hundred fifty-seven".