117618477 has 4 divisors (see below), whose sum is σ = 156824640. Its totient is φ = 78412316.

The previous prime is 117618469. The next prime is 117618491. The reversal of 117618477 is 774816711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 117618477 - 2³ = 117618469 is a prime.

It is a super-2 number, since 2×117618477² = 27668212263599058, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117618407) 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, 19603077 + ... + 19603082.

It is an arithmetic number, because the mean of its divisors is an integer number (39206160).

Almost surely, 2^117618477 is an apocalyptic number.

It is an amenable number.

117618477 is a deficient number, since it is larger than the sum of its proper divisors (39206163).

117618477 is an equidigital number, since it uses as much as digits as its factorization.

117618477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39206162.

The product of its digits is 65856, while the sum is 42.

The square root of 117618477 is about 10845.2052539360. The cubic root of 117618477 is about 489.9576209357.

The spelling of 117618477 in words is "one hundred seventeen million, six hundred eighteen thousand, four hundred seventy-seven".