117780997 has 8 divisors (see below), whose sum is σ = 122072832. Its totient is φ = 113520000.

The previous prime is 117780991. The next prime is 117781003. The reversal of 117780997 is 799087711.

It is an interprime number because it is at equal distance from previous prime (117780991) and next prime (117781003).

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 117780997 - 2¹¹ = 117778949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 117780997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117780991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213 + ... + 15349.

It is an arithmetic number, because the mean of its divisors is an integer number (15259104).

Almost surely, 2^117780997 is an apocalyptic number.

It is an amenable number.

117780997 is a deficient number, since it is larger than the sum of its proper divisors (4291835).

117780997 is a wasteful number, since it uses less digits than its factorization.

117780997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15419.

The product of its (nonzero) digits is 222264, while the sum is 49.

The square root of 117780997 is about 10852.6953794898. The cubic root of 117780997 is about 490.1831843202.

The spelling of 117780997 in words is "one hundred seventeen million, seven hundred eighty thousand, nine hundred ninety-seven".