117397457 has 2 divisors, whose sum is σ = 117397458. Its totient is φ = 117397456.

The previous prime is 117397421. The next prime is 117397459. The reversal of 117397457 is 754793711.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92756161 + 24641296 = 9631^2 + 4964^2 .

It is a cyclic number.

It is not a de Polignac number, because 117397457 - 2¹² = 117393361 is a prime.

Together with 117397459, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (117397459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58698728 + 58698729.

It is an arithmetic number, because the mean of its divisors is an integer number (58698729).

Almost surely, 2^117397457 is an apocalyptic number.

It is an amenable number.

117397457 is a deficient number, since it is larger than the sum of its proper divisors (1).

117397457 is an equidigital number, since it uses as much as digits as its factorization.

117397457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 185220, while the sum is 44.

The square root of 117397457 is about 10835.0107060399. The cubic root of 117397457 is about 489.6505310478.

The spelling of 117397457 in words is "one hundred seventeen million, three hundred ninety-seven thousand, four hundred fifty-seven".