3999990975 has 24 divisors (see below), whose sum is σ = 6628301952. Its totient is φ = 2128495200.

The previous prime is 3999990949. The next prime is 3999990989. The reversal of 3999990975 is 5790999993.

It is not a de Polignac number, because 3999990975 - 2¹³ = 3999982783 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26971 + ... + 93420.

It is an arithmetic number, because the mean of its divisors is an integer number (276179248).

Almost surely, 2^3999990975 is an apocalyptic number.

3999990975 is a deficient number, since it is larger than the sum of its proper divisors (2628310977).

3999990975 is a wasteful number, since it uses less digits than its factorization.

3999990975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120847 (or 120842 counting only the distinct ones).

The product of its (nonzero) digits is 55801305, while the sum is 69.

The square root of 3999990975 is about 63245.4818544376. The cubic root of 3999990975 is about 1587.3998581094.

The spelling of 3999990975 in words is "three billion, nine hundred ninety-nine million, nine hundred ninety thousand, nine hundred seventy-five".