117972451 has 8 divisors (see below), whose sum is σ = 123321600. Its totient is φ = 112641672.

The previous prime is 117972433. The next prime is 117972473. The reversal of 117972451 is 154279711.

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

It is not a de Polignac number, because 117972451 - 2²¹ = 115875299 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 117972451.

It is not an unprimeable number, because it can be changed into a prime (117972851) 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 7 ways as a sum of consecutive naturals, for example, 9496 + ... + 18058.

It is an arithmetic number, because the mean of its divisors is an integer number (15415200).

Almost surely, 2^117972451 is an apocalyptic number.

117972451 is a deficient number, since it is larger than the sum of its proper divisors (5349149).

117972451 is an equidigital number, since it uses as much as digits as its factorization.

117972451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9185.

The product of its digits is 17640, while the sum is 37.

The square root of 117972451 is about 10861.5123716727. The cubic root of 117972451 is about 490.4486395001.

The spelling of 117972451 in words is "one hundred seventeen million, nine hundred seventy-two thousand, four hundred fifty-one".