109716979 has 4 divisors (see below), whose sum is σ = 111515680. Its totient is φ = 107918280.

The previous prime is 109716977. The next prime is 109717021. The reversal of 109716979 is 979617901.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 979617901 = 433 ⋅2262397.

It is a cyclic number.

It is not a de Polignac number, because 109716979 - 2¹ = 109716977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109716973) 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, 899259 + ... + 899380.

It is an arithmetic number, because the mean of its divisors is an integer number (27878920).

Almost surely, 2^109716979 is an apocalyptic number.

109716979 is a deficient number, since it is larger than the sum of its proper divisors (1798701).

109716979 is an equidigital number, since it uses as much as digits as its factorization.

109716979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1798700.

The product of its (nonzero) digits is 214326, while the sum is 49.

The square root of 109716979 is about 10474.5872949725. The cubic root of 109716979 is about 478.7307017288.

The spelling of 109716979 in words is "one hundred nine million, seven hundred sixteen thousand, nine hundred seventy-nine".