117902621 has 2 divisors, whose sum is σ = 117902622. Its totient is φ = 117902620.

The previous prime is 117902597. The next prime is 117902639. The reversal of 117902621 is 126209711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93508900 + 24393721 = 9670^2 + 4939^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117902621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117902651) 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, 58951310 + 58951311.

It is an arithmetic number, because the mean of its divisors is an integer number (58951311).

Almost surely, 2^117902621 is an apocalyptic number.

It is an amenable number.

117902621 is a deficient number, since it is larger than the sum of its proper divisors (1).

117902621 is an equidigital number, since it uses as much as digits as its factorization.

117902621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 117902621 is about 10858.2973342969. The cubic root of 117902621 is about 490.3518519655.

The spelling of 117902621 in words is "one hundred seventeen million, nine hundred two thousand, six hundred twenty-one".