117761551 has 4 divisors (see below), whose sum is σ = 117858600. Its totient is φ = 117664504.

The previous prime is 117761531. The next prime is 117761557. The reversal of 117761551 is 155167711.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155167711 = 127 ⋅1221793.

It is a cyclic number.

It is not a de Polignac number, because 117761551 - 2⁵ = 117761519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117761557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46681 + ... + 49138.

It is an arithmetic number, because the mean of its divisors is an integer number (29464650).

Almost surely, 2^117761551 is an apocalyptic number.

117761551 is a deficient number, since it is larger than the sum of its proper divisors (97049).

117761551 is an equidigital number, since it uses as much as digits as its factorization.

117761551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97048.

The product of its digits is 7350, while the sum is 34.

The square root of 117761551 is about 10851.7994360382. The cubic root of 117761551 is about 490.1562059250.

The spelling of 117761551 in words is "one hundred seventeen million, seven hundred sixty-one thousand, five hundred fifty-one".