117621838 has 4 divisors (see below), whose sum is σ = 176432760. Its totient is φ = 58810918.

The previous prime is 117621821. The next prime is 117621877. The reversal of 117621838 is 838126711.

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

It is a junction number, because it is equal to n+sod(n) for n = 117621797 and 117621806.

It is a congruent number.

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, 29405458 + ... + 29405461.

It is an arithmetic number, because the mean of its divisors is an integer number (44108190).

Almost surely, 2^117621838 is an apocalyptic number.

117621838 is a deficient number, since it is larger than the sum of its proper divisors (58810922).

117621838 is an equidigital number, since it uses as much as digits as its factorization.

117621838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58810921.

The product of its digits is 16128, while the sum is 37.

The square root of 117621838 is about 10845.3602060974. The cubic root of 117621838 is about 489.9622878098.

The spelling of 117621838 in words is "one hundred seventeen million, six hundred twenty-one thousand, eight hundred thirty-eight".