975647243939 has 2 divisors, whose sum is σ = 975647243940. Its totient is φ = 975647243938.

The previous prime is 975647243911. The next prime is 975647243941. The reversal of 975647243939 is 939342746579.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-975647243939 is a prime.

Together with 975647243941, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (975647243999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 487823621969 + 487823621970.

It is an arithmetic number, because the mean of its divisors is an integer number (487823621970).

Almost surely, 2^975647243939 is an apocalyptic number.

975647243939 is a deficient number, since it is larger than the sum of its proper divisors (1).

975647243939 is an equidigital number, since it uses as much as digits as its factorization.

975647243939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 308629440, while the sum is 68.

The spelling of 975647243939 in words is "nine hundred seventy-five billion, six hundred forty-seven million, two hundred forty-three thousand, nine hundred thirty-nine".