975631387 has 2 divisors, whose sum is σ = 975631388. Its totient is φ = 975631386.

The previous prime is 975631339. The next prime is 975631403. The reversal of 975631387 is 783136579.

It is a strong prime.

It is an emirp because it is prime and its reverse (783136579) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 975631387 - 2⁷ = 975631259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 975631387.

It is not a weakly prime, because it can be changed into another prime (975631337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 487815693 + 487815694.

It is an arithmetic number, because the mean of its divisors is an integer number (487815694).

Almost surely, 2^975631387 is an apocalyptic number.

975631387 is a deficient number, since it is larger than the sum of its proper divisors (1).

975631387 is an equidigital number, since it uses as much as digits as its factorization.

975631387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 952560, while the sum is 49.

The square root of 975631387 is about 31235.0986391911. The cubic root of 975631387 is about 991.8102399317.

The spelling of 975631387 in words is "nine hundred seventy-five million, six hundred thirty-one thousand, three hundred eighty-seven".