117639737 has 2 divisors, whose sum is σ = 117639738. Its totient is φ = 117639736.

The previous prime is 117639679. The next prime is 117639751. The reversal of 117639737 is 737936711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101989801 + 15649936 = 10099^2 + 3956^2 .

It is an emirp because it is prime and its reverse (737936711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117639737 - 2⁶ = 117639673 is a prime.

It is not a weakly prime, because it can be changed into another prime (117639037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58819868 + 58819869.

It is an arithmetic number, because the mean of its divisors is an integer number (58819869).

Almost surely, 2^117639737 is an apocalyptic number.

It is an amenable number.

117639737 is a deficient number, since it is larger than the sum of its proper divisors (1).

117639737 is an equidigital number, since it uses as much as digits as its factorization.

117639737 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 166698, while the sum is 44.

The square root of 117639737 is about 10846.1853662935. The cubic root of 117639737 is about 489.9871397430.

The spelling of 117639737 in words is "one hundred seventeen million, six hundred thirty-nine thousand, seven hundred thirty-seven".