117709213 has 2 divisors, whose sum is σ = 117709214.
Its totient is φ = 117709212.
The previous prime is 117709169. The next prime is 117709219. The reversal of 117709213 is 312907711.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 100841764 + 16867449 = 10042^2 + 4107^2
It is a cyclic number.
It is not a de Polignac number, because 117709213 - 213 = 117701021 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (117709219) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58854606 + 58854607.
It is an arithmetic number, because the mean of its divisors is an integer number (58854607).
Almost surely, 2117709213 is an apocalyptic number.
It is an amenable number.
117709213 is a deficient number, since it is larger than the sum of its proper divisors (1).
117709213 is an equidigital number, since it uses as much as digits as its factorization.
117709213 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 2646, while the sum is 31.
The square root of 117709213 is about 10849.3876785743.
The cubic root of 117709213 is about 490.0835800785.
The spelling of 117709213 in words is "one hundred seventeen million, seven hundred nine thousand, two hundred thirteen".