975821663 has 2 divisors, whose sum is σ = 975821664. Its totient is φ = 975821662.

The previous prime is 975821653. The next prime is 975821669. The reversal of 975821663 is 366128579.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 975821663 - 2⁴ = 975821647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (975821669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 487910831 + 487910832.

It is an arithmetic number, because the mean of its divisors is an integer number (487910832).

Almost surely, 2^975821663 is an apocalyptic number.

975821663 is a deficient number, since it is larger than the sum of its proper divisors (1).

975821663 is an equidigital number, since it uses as much as digits as its factorization.

975821663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 47.

The square root of 975821663 is about 31238.1443591005. The cubic root of 975821663 is about 991.8747128534.

The spelling of 975821663 in words is "nine hundred seventy-five million, eight hundred twenty-one thousand, six hundred sixty-three".