975491990 has 16 divisors (see below), whose sum is σ = 1915511760. Its totient is φ = 354724320.

The previous prime is 975491987. The next prime is 975492029. The reversal of 975491990 is 99194579.

975491990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4433945 + ... + 4434164.

It is an arithmetic number, because the mean of its divisors is an integer number (119719485).

Almost surely, 2^975491990 is an apocalyptic number.

975491990 is a deficient number, since it is larger than the sum of its proper divisors (940019770).

975491990 is a wasteful number, since it uses less digits than its factorization.

975491990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8868127.

The product of its (nonzero) digits is 918540, while the sum is 53.

The square root of 975491990 is about 31232.8671434436. The cubic root of 975491990 is about 991.7630014770.

The spelling of 975491990 in words is "nine hundred seventy-five million, four hundred ninety-one thousand, nine hundred ninety".