117397381 has 2 divisors, whose sum is σ = 117397382. Its totient is φ = 117397380.

The previous prime is 117397369. The next prime is 117397417. The reversal of 117397381 is 183793711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111492481 + 5904900 = 10559^2 + 2430^2 .

It is a cyclic number.

It is not a de Polignac number, because 117397381 - 2⁵ = 117397349 is a prime.

It is a super-2 number, since 2×117397381² = 27564290131318322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117397321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58698690 + 58698691.

It is an arithmetic number, because the mean of its divisors is an integer number (58698691).

Almost surely, 2^117397381 is an apocalyptic number.

It is an amenable number.

117397381 is a deficient number, since it is larger than the sum of its proper divisors (1).

117397381 is an equidigital number, since it uses as much as digits as its factorization.

117397381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31752, while the sum is 40.

The square root of 117397381 is about 10835.0071988901. The cubic root of 117397381 is about 489.6504253855.

The spelling of 117397381 in words is "one hundred seventeen million, three hundred ninety-seven thousand, three hundred eighty-one".