117521479 has 16 divisors (see below), whose sum is σ = 127687680. Its totient is φ = 107805600.

The previous prime is 117521473. The next prime is 117521489. The reversal of 117521479 is 974125711.

It is a cyclic number.

It is not a de Polignac number, because 117521479 - 2¹⁵ = 117488711 is a prime.

It is a super-2 number, since 2×117521479² = 27622596052694882, which contains 22 as substring.

It is a Duffinian number.

Its product of digits (17640) is a multiple of the sum of its prime divisors (1470).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117521473) 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, 89542 + ... + 90844.

It is an arithmetic number, because the mean of its divisors is an integer number (7980480).

Almost surely, 2^117521479 is an apocalyptic number.

117521479 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

117521479 is a deficient number, since it is larger than the sum of its proper divisors (10166201).

117521479 is a wasteful number, since it uses less digits than its factorization.

117521479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1470.

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

The square root of 117521479 is about 10840.7324014570. The cubic root of 117521479 is about 489.8228972629.

It can be divided in two parts, 11752 and 1479, that added together give a palindrome (13231).

The spelling of 117521479 in words is "one hundred seventeen million, five hundred twenty-one thousand, four hundred seventy-nine".