117951 has 4 divisors (see below), whose sum is σ = 157272. Its totient is φ = 78632.

The previous prime is 117937. The next prime is 117959. The reversal of 117951 is 159711.

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 117951 - 2¹⁰ = 116927 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117959) 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, 19656 + ... + 19661.

It is an arithmetic number, because the mean of its divisors is an integer number (39318).

2¹¹⁷⁹⁵¹ is an apocalyptic number.

117951 is a deficient number, since it is larger than the sum of its proper divisors (39321).

117951 is an equidigital number, since it uses as much as digits as its factorization.

117951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39320.

The product of its digits is 315, while the sum is 24.

The square root of 117951 is about 343.4399510832. The cubic root of 117951 is about 49.0418911510.

The spelling of 117951 in words is "one hundred seventeen thousand, nine hundred fifty-one".