117720431 has 2 divisors, whose sum is σ = 117720432. Its totient is φ = 117720430.

The previous prime is 117720419. The next prime is 117720443. The reversal of 117720431 is 134027711.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (117720419) and next prime (117720443).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117720431 is a prime.

It is a super-2 number, since 2×117720431² = 27716199749651522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 117720431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117720131) 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, 58860215 + 58860216.

It is an arithmetic number, because the mean of its divisors is an integer number (58860216).

Almost surely, 2^117720431 is an apocalyptic number.

117720431 is a deficient number, since it is larger than the sum of its proper divisors (1).

117720431 is an equidigital number, since it uses as much as digits as its factorization.

117720431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 117720431 is about 10849.9046539589. The cubic root of 117720431 is about 490.0991483387.

The spelling of 117720431 in words is "one hundred seventeen million, seven hundred twenty thousand, four hundred thirty-one".