117506819 has 4 divisors (see below), whose sum is σ = 119498520. Its totient is φ = 115515120.

The previous prime is 117506813. The next prime is 117506827. The reversal of 117506819 is 918605711.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117506819 is a prime.

It is a super-2 number, since 2×117506819² = 27615705022997522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117506813) 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, 995762 + ... + 995879.

It is an arithmetic number, because the mean of its divisors is an integer number (29874630).

Almost surely, 2^117506819 is an apocalyptic number.

117506819 is a deficient number, since it is larger than the sum of its proper divisors (1991701).

117506819 is an equidigital number, since it uses as much as digits as its factorization.

117506819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1991700.

The product of its (nonzero) digits is 15120, while the sum is 38.

The square root of 117506819 is about 10840.0562267914. The cubic root of 117506819 is about 489.8025290648.

The spelling of 117506819 in words is "one hundred seventeen million, five hundred six thousand, eight hundred nineteen".