117976021 has 2 divisors, whose sum is σ = 117976022. Its totient is φ = 117976020.

The previous prime is 117975967. The next prime is 117976037. The reversal of 117976021 is 120679711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114789796 + 3186225 = 10714^2 + 1785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117976021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117976081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58988010 + 58988011.

It is an arithmetic number, because the mean of its divisors is an integer number (58988011).

Almost surely, 2^117976021 is an apocalyptic number.

It is an amenable number.

117976021 is a deficient number, since it is larger than the sum of its proper divisors (1).

117976021 is an equidigital number, since it uses as much as digits as its factorization.

117976021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5292, while the sum is 34.

The square root of 117976021 is about 10861.6767121840. The cubic root of 117976021 is about 490.4535866550.

The spelling of 117976021 in words is "one hundred seventeen million, nine hundred seventy-six thousand, twenty-one".