975031861 has 2 divisors, whose sum is σ = 975031862. Its totient is φ = 975031860.

The previous prime is 975031859. The next prime is 975031909. The reversal of 975031861 is 168130579.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 515744100 + 459287761 = 22710^2 + 21431^2 .

It is a cyclic number.

It is not a de Polignac number, because 975031861 - 2¹ = 975031859 is a prime.

Together with 975031859, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (975031061) 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, 487515930 + 487515931.

It is an arithmetic number, because the mean of its divisors is an integer number (487515931).

Almost surely, 2^975031861 is an apocalyptic number.

It is an amenable number.

975031861 is a deficient number, since it is larger than the sum of its proper divisors (1).

975031861 is an equidigital number, since it uses as much as digits as its factorization.

975031861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 975031861 is about 31225.5001721350. The cubic root of 975031861 is about 991.6070423331.

The spelling of 975031861 in words is "nine hundred seventy-five million, thirty-one thousand, eight hundred sixty-one".