108979809 has 16 divisors (see below), whose sum is σ = 154649088. Its totient is φ = 68026112.

The previous prime is 108979807. The next prime is 108979811. The reversal of 108979809 is 908979801.

It is an interprime number because it is at equal distance from previous prime (108979807) and next prime (108979811).

It is not a de Polignac number, because 108979809 - 2¹ = 108979807 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (108979807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4624 + ... + 15470.

It is an arithmetic number, because the mean of its divisors is an integer number (9665568).

Almost surely, 2^108979809 is an apocalyptic number.

It is an amenable number.

108979809 is a deficient number, since it is larger than the sum of its proper divisors (45669279).

108979809 is a wasteful number, since it uses less digits than its factorization.

108979809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11064.

The product of its (nonzero) digits is 326592, while the sum is 51.

The square root of 108979809 is about 10439.3394906000. The cubic root of 108979809 is about 477.6561210212.

It can be divided in two parts, 10897 and 9809, that added together give a triangular number (20706 = T₂₀₃).

The spelling of 108979809 in words is "one hundred eight million, nine hundred seventy-nine thousand, eight hundred nine".