117789391 has 2 divisors, whose sum is σ = 117789392. Its totient is φ = 117789390.

The previous prime is 117789361. The next prime is 117789421. The reversal of 117789391 is 193987711.

It is a balanced prime because it is at equal distance from previous prime (117789361) and next prime (117789421).

It is a cyclic number.

It is not a de Polignac number, because 117789391 - 2⁷ = 117789263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117789361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58894695 + 58894696.

It is an arithmetic number, because the mean of its divisors is an integer number (58894696).

Almost surely, 2^117789391 is an apocalyptic number.

117789391 is a deficient number, since it is larger than the sum of its proper divisors (1).

117789391 is an equidigital number, since it uses as much as digits as its factorization.

117789391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 95256, while the sum is 46.

The square root of 117789391 is about 10853.0820968055. The cubic root of 117789391 is about 490.1948288129.

The spelling of 117789391 in words is "one hundred seventeen million, seven hundred eighty-nine thousand, three hundred ninety-one".