117537815 has 4 divisors (see below), whose sum is σ = 141045384. Its totient is φ = 94030248.

The previous prime is 117537799. The next prime is 117537817. The reversal of 117537815 is 518735711.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 117537815 - 2⁴ = 117537799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117537817) 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 3 ways as a sum of consecutive naturals, for example, 11753777 + ... + 11753786.

It is an arithmetic number, because the mean of its divisors is an integer number (35261346).

Almost surely, 2^117537815 is an apocalyptic number.

117537815 is a deficient number, since it is larger than the sum of its proper divisors (23507569).

117537815 is an equidigital number, since it uses as much as digits as its factorization.

117537815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23507568.

The product of its digits is 29400, while the sum is 38.

The square root of 117537815 is about 10841.4858299036. The cubic root of 117537815 is about 489.8455920536.

The spelling of 117537815 in words is "one hundred seventeen million, five hundred thirty-seven thousand, eight hundred fifteen".