117551639 has 4 divisors (see below), whose sum is σ = 117628224. Its totient is φ = 117475056.

The previous prime is 117551563. The next prime is 117551641. The reversal of 117551639 is 936155711.

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

It is a cyclic number.

It is not a de Polignac number, because 117551639 - 2¹² = 117547543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117551669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35942 + ... + 39075.

It is an arithmetic number, because the mean of its divisors is an integer number (29407056).

Almost surely, 2^117551639 is an apocalyptic number.

117551639 is a deficient number, since it is larger than the sum of its proper divisors (76585).

117551639 is an equidigital number, since it uses as much as digits as its factorization.

117551639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76584.

The product of its digits is 28350, while the sum is 38.

The square root of 117551639 is about 10842.1233621464. The cubic root of 117551639 is about 489.8647954053.

The spelling of 117551639 in words is "one hundred seventeen million, five hundred fifty-one thousand, six hundred thirty-nine".