3958999 has 6 divisors (see below), whose sum is σ = 4351760. Its totient is φ = 3598980.

The previous prime is 3958957. The next prime is 3959003. The reversal of 3958999 is 9998593.

It is not a de Polignac number, because 3958999 - 2¹⁵ = 3926231 is a prime.

It is a Duffinian number.

3958999 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3958949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16239 + ... + 16480.

Almost surely, 2^3958999 is an apocalyptic number.

3958999 is a deficient number, since it is larger than the sum of its proper divisors (392761).

3958999 is a wasteful number, since it uses less digits than its factorization.

3958999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32741 (or 32730 counting only the distinct ones).

The product of its digits is 787320, while the sum is 52.

The square root of 3958999 is about 1989.7233476039. The cubic root of 3958999 is about 158.1958661561.

The spelling of 3958999 in words is "three million, nine hundred fifty-eight thousand, nine hundred ninety-nine".