109780917 has 32 divisors (see below), whose sum is σ = 164131200. Its totient is φ = 64862208.

The previous prime is 109780901. The next prime is 109780919. The reversal of 109780917 is 719087901.

It is a happy number.

It is not a de Polignac number, because 109780917 - 2⁴ = 109780901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109780919) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 268209 + ... + 268617.

It is an arithmetic number, because the mean of its divisors is an integer number (5129100).

Almost surely, 2^109780917 is an apocalyptic number.

109780917 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

109780917 is a deficient number, since it is larger than the sum of its proper divisors (54350283).

109780917 is a wasteful number, since it uses less digits than its factorization.

109780917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725.

The product of its (nonzero) digits is 31752, while the sum is 42.

The square root of 109780917 is about 10477.6389038752. The cubic root of 109780917 is about 478.8236777353.

The spelling of 109780917 in words is "one hundred nine million, seven hundred eighty thousand, nine hundred seventeen".