117864431 has 2 divisors, whose sum is σ = 117864432. Its totient is φ = 117864430.

The previous prime is 117864407. The next prime is 117864433. The reversal of 117864431 is 134468711.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 117864431 - 2¹⁴ = 117848047 is a prime.

It is a super-2 number, since 2×117864431² = 27784048189907522, which contains 22 as substring.

Together with 117864433, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 117864391 and 117864400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117864433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58932215 + 58932216.

It is an arithmetic number, because the mean of its divisors is an integer number (58932216).

Almost surely, 2^117864431 is an apocalyptic number.

117864431 is a deficient number, since it is larger than the sum of its proper divisors (1).

117864431 is an equidigital number, since it uses as much as digits as its factorization.

117864431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 35.

The square root of 117864431 is about 10856.5386288633. The cubic root of 117864431 is about 490.2989027340.

The spelling of 117864431 in words is "one hundred seventeen million, eight hundred sixty-four thousand, four hundred thirty-one".