117521663 has 16 divisors (see below), whose sum is σ = 142588224. Its totient is φ = 94556160.

The previous prime is 117521653. The next prime is 117521683. The reversal of 117521663 is 366125711.

It is a cyclic number.

It is not a de Polignac number, because 117521663 - 2⁴ = 117521647 is a prime.

It is a super-2 number, since 2×117521663² = 27622682548571138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117521603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53303 + ... + 55463.

It is an arithmetic number, because the mean of its divisors is an integer number (8911764).

Almost surely, 2^117521663 is an apocalyptic number.

117521663 is a deficient number, since it is larger than the sum of its proper divisors (25066561).

117521663 is a wasteful number, since it uses less digits than its factorization.

117521663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2642.

The product of its digits is 7560, while the sum is 32.

The square root of 117521663 is about 10840.7408879652. The cubic root of 117521663 is about 489.8231528966.

The spelling of 117521663 in words is "one hundred seventeen million, five hundred twenty-one thousand, six hundred sixty-three".