117378731 has 2 divisors, whose sum is σ = 117378732. Its totient is φ = 117378730.

The previous prime is 117378719. The next prime is 117378733. The reversal of 117378731 is 137873711.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117378731 is a prime.

It is a super-2 number, since 2×117378731² = 27555532982340722, which contains 22 as substring.

Together with 117378733, 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 (117378733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58689365 + 58689366.

It is an arithmetic number, because the mean of its divisors is an integer number (58689366).

Almost surely, 2^117378731 is an apocalyptic number.

117378731 is a deficient number, since it is larger than the sum of its proper divisors (1).

117378731 is an equidigital number, since it uses as much as digits as its factorization.

117378731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24696, while the sum is 38.

The square root of 117378731 is about 10834.1465284535. The cubic root of 117378731 is about 489.6244950397.

The spelling of 117378731 in words is "one hundred seventeen million, three hundred seventy-eight thousand, seven hundred thirty-one".