117310561 has 3 divisors (see below), whose sum is σ = 117321393. Its totient is φ = 117299730.

The previous prime is 117310559. The next prime is 117310573. The reversal of 117310561 is 165013711.

The square root of 117310561 is 10831.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 117310561 - 2¹ = 117310559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117311561) 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 2 ways as a sum of consecutive naturals, for example, 5416 + ... + 16246.

It is an arithmetic number, because the mean of its divisors is an integer number (39107131).

Almost surely, 2^117310561 is an apocalyptic number.

117310561 is the 10831-st square number.

117310561 is the 5416-th centered octagonal number.

It is an amenable number.

117310561 is a deficient number, since it is larger than the sum of its proper divisors (10832).

117310561 is an frugal number, since it uses more digits than its factorization.

117310561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21662 (or 10831 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 25.

The cubic root of 117310561 is about 489.5296903415.

Multiplying 117310561 by its sum of digits (25), we get a square (2932764025 = 54155²).

The spelling of 117310561 in words is "one hundred seventeen million, three hundred ten thousand, five hundred sixty-one".