117572891 has 4 divisors (see below), whose sum is σ = 117697992. Its totient is φ = 117447792.

The previous prime is 117572887. The next prime is 117572909. The reversal of 117572891 is 198275711.

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 117572891 - 2² = 117572887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117572821) 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, 61130 + ... + 63023.

It is an arithmetic number, because the mean of its divisors is an integer number (29424498).

Almost surely, 2^117572891 is an apocalyptic number.

117572891 is a deficient number, since it is larger than the sum of its proper divisors (125101).

117572891 is an equidigital number, since it uses as much as digits as its factorization.

117572891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125100.

The product of its digits is 35280, while the sum is 41.

The square root of 117572891 is about 10843.1033841793. The cubic root of 117572891 is about 489.8943142886.

The spelling of 117572891 in words is "one hundred seventeen million, five hundred seventy-two thousand, eight hundred ninety-one".