117945431 has 4 divisors (see below), whose sum is σ = 120688392. Its totient is φ = 115202472.

The previous prime is 117945389. The next prime is 117945437. The reversal of 117945431 is 134549711.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 117945431 - 2⁶ = 117945367 is a prime.

It is a super-2 number, since 2×117945431² = 27822249387551522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 117945391 and 117945400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117945437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1371416 + ... + 1371501.

It is an arithmetic number, because the mean of its divisors is an integer number (30172098).

Almost surely, 2^117945431 is an apocalyptic number.

117945431 is a deficient number, since it is larger than the sum of its proper divisors (2742961).

117945431 is an equidigital number, since it uses as much as digits as its factorization.

117945431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2742960.

The product of its digits is 15120, while the sum is 35.

The square root of 117945431 is about 10860.2684589286. The cubic root of 117945431 is about 490.4111930907.

The spelling of 117945431 in words is "one hundred seventeen million, nine hundred forty-five thousand, four hundred thirty-one".