117540513 has 6 divisors (see below), whose sum is σ = 169780754. Its totient is φ = 78360336.

The previous prime is 117540503. The next prime is 117540523. The reversal of 117540513 is 315045711.

117540513 is a `hidden beast` number, since 117 + 540 + 5 + 1 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (117540503) and next prime (117540523).

It can be written as a sum of positive squares in only one way, i.e., 117353889 + 186624 = 10833^2 + 432^2 .

It is not a de Polignac number, because 117540513 - 2⁴ = 117540497 is a prime.

It is a super-3 number, since 3×117540513³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (117540503) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6530020 + ... + 6530037.

Almost surely, 2^117540513 is an apocalyptic number.

It is an amenable number.

117540513 is a deficient number, since it is larger than the sum of its proper divisors (52240241).

117540513 is a wasteful number, since it uses less digits than its factorization.

117540513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13060063 (or 13060060 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 117540513 is about 10841.6102586286. The cubic root of 117540513 is about 489.8493400482.

The spelling of 117540513 in words is "one hundred seventeen million, five hundred forty thousand, five hundred thirteen".