117262891 has 4 divisors (see below), whose sum is σ = 117965232. Its totient is φ = 116560552.

The previous prime is 117262877. The next prime is 117262903. The reversal of 117262891 is 198262711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 198262711 = 331 ⋅598981.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117262891 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 117262891.

It is not an unprimeable number, because it can be changed into a prime (117268891) 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, 350920 + ... + 351253.

It is an arithmetic number, because the mean of its divisors is an integer number (29491308).

Almost surely, 2^117262891 is an apocalyptic number.

117262891 is a deficient number, since it is larger than the sum of its proper divisors (702341).

117262891 is an equidigital number, since it uses as much as digits as its factorization.

117262891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702340.

The product of its digits is 12096, while the sum is 37.

The square root of 117262891 is about 10828.7991485668. The cubic root of 117262891 is about 489.4633733741.

The spelling of 117262891 in words is "one hundred seventeen million, two hundred sixty-two thousand, eight hundred ninety-one".