975129290921 has 4 divisors (see below), whose sum is σ = 1026451885200. Its totient is φ = 923806696644.

The previous prime is 975129290917. The next prime is 975129291049. The reversal of 975129290921 is 129092921579.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 975129290921 - 2² = 975129290917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (975129298921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25661297111 + ... + 25661297148.

It is an arithmetic number, because the mean of its divisors is an integer number (256612971300).

Almost surely, 2^975129290921 is an apocalyptic number.

It is an amenable number.

975129290921 is a deficient number, since it is larger than the sum of its proper divisors (51322594279).

975129290921 is a wasteful number, since it uses less digits than its factorization.

975129290921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51322594278.

The product of its (nonzero) digits is 1837080, while the sum is 56.

The spelling of 975129290921 in words is "nine hundred seventy-five billion, one hundred twenty-nine million, two hundred ninety thousand, nine hundred twenty-one".