117517951 has 4 divisors (see below), whose sum is σ = 119005600. Its totient is φ = 116030304.

The previous prime is 117517937. The next prime is 117517963. The reversal of 117517951 is 159715711.

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 117517951 - 2⁷ = 117517823 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 117517951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117517921) 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, 743706 + ... + 743863.

It is an arithmetic number, because the mean of its divisors is an integer number (29751400).

Almost surely, 2^117517951 is an apocalyptic number.

117517951 is a deficient number, since it is larger than the sum of its proper divisors (1487649).

117517951 is an equidigital number, since it uses as much as digits as its factorization.

117517951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1487648.

The product of its digits is 11025, while the sum is 37.

The square root of 117517951 is about 10840.5696806026. The cubic root of 117517951 is about 489.8179957121.

The spelling of 117517951 in words is "one hundred seventeen million, five hundred seventeen thousand, nine hundred fifty-one".