117658081 has 4 divisors (see below), whose sum is σ = 119586964. Its totient is φ = 115729200.

The previous prime is 117658067. The next prime is 117658103. The reversal of 117658081 is 180856711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 180856711 = 7 ⋅25836673.

It can be written as a sum of positive squares in 2 ways, for example, as 8643600 + 109014481 = 2940^2 + 10441^2 .

It is not a de Polignac number, because 117658081 - 2⁵ = 117658049 is a prime.

It is a super-2 number, since 2×117658081² = 27686848049205122, which contains 22 as substring.

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 117658081.

It is not an unprimeable number, because it can be changed into a prime (117658181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 964350 + ... + 964471.

It is an arithmetic number, because the mean of its divisors is an integer number (29896741).

Almost surely, 2^117658081 is an apocalyptic number.

It is an amenable number.

117658081 is a deficient number, since it is larger than the sum of its proper divisors (1928883).

117658081 is an equidigital number, since it uses as much as digits as its factorization.

117658081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1928882.

The product of its (nonzero) digits is 13440, while the sum is 37.

The square root of 117658081 is about 10847.0309762626. The cubic root of 117658081 is about 490.0126069226.

The spelling of 117658081 in words is "one hundred seventeen million, six hundred fifty-eight thousand, eighty-one".