117312389 has 2 divisors, whose sum is σ = 117312390. Its totient is φ = 117312388.

The previous prime is 117312383. The next prime is 117312457. The reversal of 117312389 is 983213711.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113252164 + 4060225 = 10642^2 + 2015^2 .

It is an emirp because it is prime and its reverse (983213711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117312389 - 2⁸ = 117312133 is a prime.

It is a super-2 number, since 2×117312389² = 27524393225774642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117312383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58656194 + 58656195.

It is an arithmetic number, because the mean of its divisors is an integer number (58656195).

Almost surely, 2^117312389 is an apocalyptic number.

It is an amenable number.

117312389 is a deficient number, since it is larger than the sum of its proper divisors (1).

117312389 is an equidigital number, since it uses as much as digits as its factorization.

117312389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 35.

The square root of 117312389 is about 10831.0843870778. The cubic root of 117312389 is about 489.5322330385.

The spelling of 117312389 in words is "one hundred seventeen million, three hundred twelve thousand, three hundred eighty-nine".