975838921 has 2 divisors, whose sum is σ = 975838922. Its totient is φ = 975838920.

The previous prime is 975838891. The next prime is 975838931. The reversal of 975838921 is 129838579.

975838921 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., 971194896 + 4644025 = 31164^2 + 2155^2 .

It is a cyclic number.

It is not a de Polignac number, because 975838921 - 2⁷ = 975838793 is a prime.

It is not a weakly prime, because it can be changed into another prime (975838931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 487919460 + 487919461.

It is an arithmetic number, because the mean of its divisors is an integer number (487919461).

Almost surely, 2^975838921 is an apocalyptic number.

It is an amenable number.

975838921 is a deficient number, since it is larger than the sum of its proper divisors (1).

975838921 is an equidigital number, since it uses as much as digits as its factorization.

975838921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 52.

The square root of 975838921 is about 31238.4205906765. The cubic root of 975838921 is about 991.8805601216.

The spelling of 975838921 in words is "nine hundred seventy-five million, eight hundred thirty-eight thousand, nine hundred twenty-one".