117631397 has 8 divisors (see below), whose sum is σ = 128416344. Its totient is φ = 107094528.

The previous prime is 117631379. The next prime is 117631403. The reversal of 117631397 is 793136711.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 37957921 + 79673476 = 6161^2 + 8926^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 117631397 - 2²⁴ = 100854181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 117631397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117631597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61028 + ... + 62925.

It is an arithmetic number, because the mean of its divisors is an integer number (16052043).

Almost surely, 2^117631397 is an apocalyptic number.

It is an amenable number.

117631397 is a deficient number, since it is larger than the sum of its proper divisors (10784947).

117631397 is a wasteful number, since it uses less digits than its factorization.

117631397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124039.

The product of its digits is 23814, while the sum is 38.

The square root of 117631397 is about 10845.8008925114. The cubic root of 117631397 is about 489.9755603526.

The spelling of 117631397 in words is "one hundred seventeen million, six hundred thirty-one thousand, three hundred ninety-seven".