118617431 has 2 divisors, whose sum is σ = 118617432. Its totient is φ = 118617430.

The previous prime is 118617419. The next prime is 118617451. The reversal of 118617431 is 134716811.

It is a weak prime.

It is an emirp because it is prime and its reverse (134716811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 118617431 - 2¹⁸ = 118355287 is a prime.

It is a super-2 number, since 2×118617431² = 28140189874079522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118617451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59308715 + 59308716.

It is an arithmetic number, because the mean of its divisors is an integer number (59308716).

Almost surely, 2^118617431 is an apocalyptic number.

118617431 is a deficient number, since it is larger than the sum of its proper divisors (1).

118617431 is an equidigital number, since it uses as much as digits as its factorization.

118617431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 32.

The square root of 118617431 is about 10891.1629773868. The cubic root of 118617431 is about 491.3408105833.

The spelling of 118617431 in words is "one hundred eighteen million, six hundred seventeen thousand, four hundred thirty-one".