117553621 has 8 divisors (see below), whose sum is σ = 123931584. Its totient is φ = 111281280.

The previous prime is 117553607. The next prime is 117553633. The reversal of 117553621 is 126355711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117553621 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 (117553021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24115 + ... + 28576.

It is an arithmetic number, because the mean of its divisors is an integer number (15491448).

Almost surely, 2^117553621 is an apocalyptic number.

It is an amenable number.

117553621 is a deficient number, since it is larger than the sum of its proper divisors (6377963).

117553621 is an equidigital number, since it uses as much as digits as its factorization.

117553621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52811.

The product of its digits is 6300, while the sum is 31.

The square root of 117553621 is about 10842.2147645211. The cubic root of 117553621 is about 489.8675485402.

It can be divided in two parts, 11755 and 3621, that added together give a square (15376 = 124²).

The spelling of 117553621 in words is "one hundred seventeen million, five hundred fifty-three thousand, six hundred twenty-one".