1109145279 has 16 divisors (see below), whose sum is σ = 1614810240. Its totient is φ = 671580960.

The previous prime is 1109145259. The next prime is 1109145299. The reversal of 1109145279 is 9725419011.

It is an interprime number because it is at equal distance from previous prime (1109145259) and next prime (1109145299).

It is not a de Polignac number, because 1109145279 - 2⁹ = 1109144767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109145209) 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, 21444 + ... + 51750.

It is an arithmetic number, because the mean of its divisors is an integer number (100925640).

Almost surely, 2^1109145279 is an apocalyptic number.

1109145279 is a deficient number, since it is larger than the sum of its proper divisors (505664961).

1109145279 is a wasteful number, since it uses less digits than its factorization.

1109145279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31430.

The product of its (nonzero) digits is 22680, while the sum is 39.

The square root of 1109145279 is about 33303.8327974424. The cubic root of 1109145279 is about 1035.1329783165.

The spelling of 1109145279 in words is "one billion, one hundred nine million, one hundred forty-five thousand, two hundred seventy-nine".