117500851 has 4 divisors (see below), whose sum is σ = 126539392. Its totient is φ = 108462312.

The previous prime is 117500833. The next prime is 117500861. The reversal of 117500851 is 158005711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 158005711 = 4801 ⋅32911.

It is a cyclic number.

It is not a de Polignac number, because 117500851 - 2⁷ = 117500723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117500861) 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, 4519251 + ... + 4519276.

It is an arithmetic number, because the mean of its divisors is an integer number (31634848).

Almost surely, 2^117500851 is an apocalyptic number.

117500851 is a deficient number, since it is larger than the sum of its proper divisors (9038541).

117500851 is an equidigital number, since it uses as much as digits as its factorization.

117500851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9038540.

The product of its (nonzero) digits is 1400, while the sum is 28.

The square root of 117500851 is about 10839.7809479712. The cubic root of 117500851 is about 489.7942368057.

The spelling of 117500851 in words is "one hundred seventeen million, five hundred thousand, eight hundred fifty-one".