109599979 has 2 divisors, whose sum is σ = 109599980. Its totient is φ = 109599978.

The previous prime is 109599871. The next prime is 109600021. The reversal of 109599979 is 979995901.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 109599979 - 2¹⁷ = 109468907 is a prime.

It is not a weakly prime, because it can be changed into another prime (109599179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54799989 + 54799990.

It is an arithmetic number, because the mean of its divisors is an integer number (54799990).

Almost surely, 2^109599979 is an apocalyptic number.

109599979 is a deficient number, since it is larger than the sum of its proper divisors (1).

109599979 is an equidigital number, since it uses as much as digits as its factorization.

109599979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2066715, while the sum is 58.

The square root of 109599979 is about 10469.0008596809. Note that the first 3 decimals coincide. The cubic root of 109599979 is about 478.5604715776.

The spelling of 109599979 in words is "one hundred nine million, five hundred ninety-nine thousand, nine hundred seventy-nine".