117641639 has 2 divisors, whose sum is σ = 117641640. Its totient is φ = 117641638.

The previous prime is 117641633. The next prime is 117641653. The reversal of 117641639 is 936146711.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 117641639 - 2⁸ = 117641383 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117641633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58820819 + 58820820.

It is an arithmetic number, because the mean of its divisors is an integer number (58820820).

Almost surely, 2^117641639 is an apocalyptic number.

117641639 is a deficient number, since it is larger than the sum of its proper divisors (1).

117641639 is an equidigital number, since it uses as much as digits as its factorization.

117641639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 38.

The square root of 117641639 is about 10846.2730465354. The cubic root of 117641639 is about 489.9897804338.

The spelling of 117641639 in words is "one hundred seventeen million, six hundred forty-one thousand, six hundred thirty-nine".