117929427881 has 4 divisors (see below), whose sum is σ = 117931713492. Its totient is φ = 117927142272.

The previous prime is 117929427877. The next prime is 117929427953. The reversal of 117929427881 is 188724929711.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30340065856 + 87589362025 = 174184^2 + 295955^2 .

It is a cyclic number.

It is not a de Polignac number, because 117929427881 - 2² = 117929427877 is a prime.

It is a super-2 number, since 2×117929427881² (a number of 23 digits) 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 117929427881.

It is not an unprimeable number, because it can be changed into a prime (117929427871) 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, 1063580 + ... + 1169213.

It is an arithmetic number, because the mean of its divisors is an integer number (29482928373).

Almost surely, 2^117929427881 is an apocalyptic number.

It is an amenable number.

117929427881 is a deficient number, since it is larger than the sum of its proper divisors (2285611).

117929427881 is an equidigital number, since it uses as much as digits as its factorization.

117929427881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2285610.

The product of its digits is 4064256, while the sum is 59.

The spelling of 117929427881 in words is "one hundred seventeen billion, nine hundred twenty-nine million, four hundred twenty-seven thousand, eight hundred eighty-one".