117784417 has 2 divisors, whose sum is σ = 117784418. Its totient is φ = 117784416.

The previous prime is 117784393. The next prime is 117784421. The reversal of 117784417 is 714487711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109809441 + 7974976 = 10479^2 + 2824^2 .

It is a cyclic number.

It is not a de Polignac number, because 117784417 - 2²³ = 109395809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 117784417.

It is not a weakly prime, because it can be changed into another prime (117784217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58892208 + 58892209.

It is an arithmetic number, because the mean of its divisors is an integer number (58892209).

Almost surely, 2^117784417 is an apocalyptic number.

It is an amenable number.

117784417 is a deficient number, since it is larger than the sum of its proper divisors (1).

117784417 is an equidigital number, since it uses as much as digits as its factorization.

117784417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43904, while the sum is 40.

The square root of 117784417 is about 10852.8529428902. The cubic root of 117784417 is about 490.1879287478.

The spelling of 117784417 in words is "one hundred seventeen million, seven hundred eighty-four thousand, four hundred seventeen".