117447431 has 2 divisors, whose sum is σ = 117447432. Its totient is φ = 117447430.

The previous prime is 117447427. The next prime is 117447433. The reversal of 117447431 is 134744711.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 117447431 - 2² = 117447427 is a prime.

It is a super-2 number, since 2×117447431² = 27587798096999522, which contains 22 as substring.

Together with 117447433, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_6704474 and since 117447431 and 6704474 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117447433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58723715 + 58723716.

It is an arithmetic number, because the mean of its divisors is an integer number (58723716).

Almost surely, 2^117447431 is an apocalyptic number.

117447431 is a deficient number, since it is larger than the sum of its proper divisors (1).

117447431 is an equidigital number, since it uses as much as digits as its factorization.

117447431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9408, while the sum is 32.

The square root of 117447431 is about 10837.3165959106. The cubic root of 117447431 is about 489.7199996858.

The spelling of 117447431 in words is "one hundred seventeen million, four hundred forty-seven thousand, four hundred thirty-one".