975320921 has 2 divisors, whose sum is σ = 975320922. Its totient is φ = 975320920.

The previous prime is 975320903. The next prime is 975320971. The reversal of 975320921 is 129023579.

975320921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 928055296 + 47265625 = 30464^2 + 6875^2 .

It is a cyclic number.

It is not a de Polignac number, because 975320921 - 2¹⁴ = 975304537 is a prime.

It is not a weakly prime, because it can be changed into another prime (975320971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 487660460 + 487660461.

It is an arithmetic number, because the mean of its divisors is an integer number (487660461).

Almost surely, 2^975320921 is an apocalyptic number.

It is an amenable number.

975320921 is a deficient number, since it is larger than the sum of its proper divisors (1).

975320921 is an equidigital number, since it uses as much as digits as its factorization.

975320921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 975320921 is about 31230.1284179236. The cubic root of 975320921 is about 991.7050239555.

The spelling of 975320921 in words is "nine hundred seventy-five million, three hundred twenty thousand, nine hundred twenty-one".