975622987 has 2 divisors, whose sum is σ = 975622988. Its totient is φ = 975622986.

The previous prime is 975622981. The next prime is 975623009. The reversal of 975622987 is 789226579.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-975622987 is a prime.

It is not a weakly prime, because it can be changed into another prime (975622981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 487811493 + 487811494.

It is an arithmetic number, because the mean of its divisors is an integer number (487811494).

Almost surely, 2^975622987 is an apocalyptic number.

975622987 is a deficient number, since it is larger than the sum of its proper divisors (1).

975622987 is an equidigital number, since it uses as much as digits as its factorization.

975622987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3810240, while the sum is 55.

The square root of 975622987 is about 31234.9641747834. The cubic root of 975622987 is about 991.8073934912.

The spelling of 975622987 in words is "nine hundred seventy-five million, six hundred twenty-two thousand, nine hundred eighty-seven".