109161439 has 4 divisors (see below), whose sum is σ = 109237120. Its totient is φ = 109085760.

The previous prime is 109161419. The next prime is 109161449. The reversal of 109161439 is 934161901.

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: 934161901 = 3821 ⋅244481.

It is a cyclic number.

It is not a de Polignac number, because 109161439 - 2⁵ = 109161407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109161419) 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, 35634 + ... + 38575.

It is an arithmetic number, because the mean of its divisors is an integer number (27309280).

Almost surely, 2^109161439 is an apocalyptic number.

109161439 is a deficient number, since it is larger than the sum of its proper divisors (75681).

109161439 is an equidigital number, since it uses as much as digits as its factorization.

109161439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75680.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 109161439 is about 10448.0351741368. The cubic root of 109161439 is about 477.9213338445.

The spelling of 109161439 in words is "one hundred nine million, one hundred sixty-one thousand, four hundred thirty-nine".