117641509 has 2 divisors, whose sum is σ = 117641510. Its totient is φ = 117641508.

The previous prime is 117641477. The next prime is 117641519. The reversal of 117641509 is 905146711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116165284 + 1476225 = 10778^2 + 1215^2 .

It is a cyclic number.

It is not a de Polignac number, because 117641509 - 2⁵ = 117641477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117641519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58820754 + 58820755.

It is an arithmetic number, because the mean of its divisors is an integer number (58820755).

Almost surely, 2^117641509 is an apocalyptic number.

It is an amenable number.

117641509 is a deficient number, since it is larger than the sum of its proper divisors (1).

117641509 is an equidigital number, since it uses as much as digits as its factorization.

117641509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 117641509 is about 10846.2670536918. The cubic root of 117641509 is about 489.9895999459.

The spelling of 117641509 in words is "one hundred seventeen million, six hundred forty-one thousand, five hundred nine".