975700090721 has 2 divisors, whose sum is σ = 975700090722. Its totient is φ = 975700090720.

The previous prime is 975700090709. The next prime is 975700090727. The reversal of 975700090721 is 127090007579.

975700090721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 602090643025 + 373609447696 = 775945^2 + 611236^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-975700090721 is a prime.

It is not a weakly prime, because it can be changed into another prime (975700090727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 487850045360 + 487850045361.

It is an arithmetic number, because the mean of its divisors is an integer number (487850045361).

Almost surely, 2^975700090721 is an apocalyptic number.

It is an amenable number.

975700090721 is a deficient number, since it is larger than the sum of its proper divisors (1).

975700090721 is an equidigital number, since it uses as much as digits as its factorization.

975700090721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 277830, while the sum is 47.

The spelling of 975700090721 in words is "nine hundred seventy-five billion, seven hundred million, ninety thousand, seven hundred twenty-one".