117256649 has 2 divisors, whose sum is σ = 117256650. Its totient is φ = 117256648.

The previous prime is 117256639. The next prime is 117256669. The reversal of 117256649 is 946652711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106234249 + 11022400 = 10307^2 + 3320^2 .

It is an emirp because it is prime and its reverse (946652711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117256649 - 2⁸ = 117256393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (117256639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58628324 + 58628325.

It is an arithmetic number, because the mean of its divisors is an integer number (58628325).

Almost surely, 2^117256649 is an apocalyptic number.

It is an amenable number.

117256649 is a deficient number, since it is larger than the sum of its proper divisors (1).

117256649 is an equidigital number, since it uses as much as digits as its factorization.

117256649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 41.

The square root of 117256649 is about 10828.5109317948. The cubic root of 117256649 is about 489.4546883742.

The spelling of 117256649 in words is "one hundred seventeen million, two hundred fifty-six thousand, six hundred forty-nine".