117698641 has 2 divisors, whose sum is σ = 117698642. Its totient is φ = 117698640.

The previous prime is 117698639. The next prime is 117698671. The reversal of 117698641 is 146896711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114404416 + 3294225 = 10696^2 + 1815^2 .

It is a cyclic number.

It is not a de Polignac number, because 117698641 - 2¹ = 117698639 is a prime.

Together with 117698639, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (117698621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58849320 + 58849321.

It is an arithmetic number, because the mean of its divisors is an integer number (58849321).

Almost surely, 2^117698641 is an apocalyptic number.

It is an amenable number.

117698641 is a deficient number, since it is larger than the sum of its proper divisors (1).

117698641 is an equidigital number, since it uses as much as digits as its factorization.

117698641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 43.

The square root of 117698641 is about 10848.9004511978. The cubic root of 117698641 is about 490.0689074271.

The spelling of 117698641 in words is "one hundred seventeen million, six hundred ninety-eight thousand, six hundred forty-one".