117877771217 has 2 divisors, whose sum is σ = 117877771218. Its totient is φ = 117877771216.

The previous prime is 117877771183. The next prime is 117877771261. The reversal of 117877771217 is 712177778711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116472720961 + 1405050256 = 341281^2 + 37484^2 .

It is a cyclic number.

It is not a de Polignac number, because 117877771217 - 2²⁰ = 117876722641 is a prime.

It is a super-2 number, since 2×117877771217² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (117877771267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58938885608 + 58938885609.

It is an arithmetic number, because the mean of its divisors is an integer number (58938885609).

Almost surely, 2^117877771217 is an apocalyptic number.

It is an amenable number.

117877771217 is a deficient number, since it is larger than the sum of its proper divisors (1).

117877771217 is an equidigital number, since it uses as much as digits as its factorization.

117877771217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1882384, while the sum is 56.

The spelling of 117877771217 in words is "one hundred seventeen billion, eight hundred seventy-seven million, seven hundred seventy-one thousand, two hundred seventeen".