117857693 has 2 divisors, whose sum is σ = 117857694. Its totient is φ = 117857692.

The previous prime is 117857689. The next prime is 117857699. The reversal of 117857693 is 396758711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85618009 + 32239684 = 9253^2 + 5678^2 .

It is an emirp because it is prime and its reverse (396758711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117857693 - 2² = 117857689 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 (117857699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58928846 + 58928847.

It is an arithmetic number, because the mean of its divisors is an integer number (58928847).

Almost surely, 2^117857693 is an apocalyptic number.

It is an amenable number.

117857693 is a deficient number, since it is larger than the sum of its proper divisors (1).

117857693 is an equidigital number, since it uses as much as digits as its factorization.

117857693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317520, while the sum is 47.

The square root of 117857693 is about 10856.2283045264. The cubic root of 117857693 is about 490.2895595224.

The spelling of 117857693 in words is "one hundred seventeen million, eight hundred fifty-seven thousand, six hundred ninety-three".