117687442 has 4 divisors (see below), whose sum is σ = 176531166. Its totient is φ = 58843720.

The previous prime is 117687403. The next prime is 117687499. The reversal of 117687442 is 244786711.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 103856481 + 13830961 = 10191^2 + 3719^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 117687395 and 117687404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29421859 + ... + 29421862.

Almost surely, 2^117687442 is an apocalyptic number.

117687442 is a deficient number, since it is larger than the sum of its proper divisors (58843724).

117687442 is an equidigital number, since it uses as much as digits as its factorization.

117687442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58843723.

The product of its digits is 75264, while the sum is 40.

The square root of 117687442 is about 10848.3843036648. The cubic root of 117687442 is about 490.0533636176.

The spelling of 117687442 in words is "one hundred seventeen million, six hundred eighty-seven thousand, four hundred forty-two".