117761521 has 4 divisors (see below), whose sum is σ = 117881344. Its totient is φ = 117641700.

The previous prime is 117761519. The next prime is 117761531. The reversal of 117761521 is 125167711.

It is a happy number.

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 117761521 - 2¹ = 117761519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117761531) 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, 58425 + ... + 60406.

It is an arithmetic number, because the mean of its divisors is an integer number (29470336).

Almost surely, 2^117761521 is an apocalyptic number.

It is an amenable number.

117761521 is a deficient number, since it is larger than the sum of its proper divisors (119823).

117761521 is an equidigital number, since it uses as much as digits as its factorization.

117761521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119822.

The product of its digits is 2940, while the sum is 31.

The square root of 117761521 is about 10851.7980537789. The cubic root of 117761521 is about 490.1561643022.

The spelling of 117761521 in words is "one hundred seventeen million, seven hundred sixty-one thousand, five hundred twenty-one".