975092821 has 2 divisors, whose sum is σ = 975092822. Its totient is φ = 975092820.

The previous prime is 975092809. The next prime is 975092831. The reversal of 975092821 is 128290579.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 582498225 + 392594596 = 24135^2 + 19814^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-975092821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (975092831) 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 as a sum of consecutive naturals, namely, 487546410 + 487546411.

It is an arithmetic number, because the mean of its divisors is an integer number (487546411).

Almost surely, 2^975092821 is an apocalyptic number.

It is an amenable number.

975092821 is a deficient number, since it is larger than the sum of its proper divisors (1).

975092821 is an equidigital number, since it uses as much as digits as its factorization.

975092821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 975092821 is about 31226.4762821552. The cubic root of 975092821 is about 991.6277073349.

The spelling of 975092821 in words is "nine hundred seventy-five million, ninety-two thousand, eight hundred twenty-one".