117138737 has 2 divisors, whose sum is σ = 117138738. Its totient is φ = 117138736.

The previous prime is 117138719. The next prime is 117138787. The reversal of 117138737 is 737831711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116985856 + 152881 = 10816^2 + 391^2 .

It is a cyclic number.

It is not a de Polignac number, because 117138737 - 2²⁶ = 50029873 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 117138737.

It is not a weakly prime, because it can be changed into another prime (117138787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58569368 + 58569369.

It is an arithmetic number, because the mean of its divisors is an integer number (58569369).

Almost surely, 2^117138737 is an apocalyptic number.

It is an amenable number.

117138737 is a deficient number, since it is larger than the sum of its proper divisors (1).

117138737 is an equidigital number, since it uses as much as digits as its factorization.

117138737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24696, while the sum is 38.

The square root of 117138737 is about 10823.0650464644. The cubic root of 117138737 is about 489.2905699281.

The spelling of 117138737 in words is "one hundred seventeen million, one hundred thirty-eight thousand, seven hundred thirty-seven".