109439439 has 4 divisors (see below), whose sum is σ = 145919256. Its totient is φ = 72959624.

The previous prime is 109439437. The next prime is 109439441. The reversal of 109439439 is 934934901.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (109439437) and next prime (109439441).

It is a cyclic number.

It is not a de Polignac number, because 109439439 - 2¹ = 109439437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 109439439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109439437) 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, 18239904 + ... + 18239909.

It is an arithmetic number, because the mean of its divisors is an integer number (36479814).

Almost surely, 2^109439439 is an apocalyptic number.

109439439 is a deficient number, since it is larger than the sum of its proper divisors (36479817).

109439439 is an equidigital number, since it uses as much as digits as its factorization.

109439439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36479816.

The product of its (nonzero) digits is 104976, while the sum is 42.

The square root of 109439439 is about 10461.3306514994. The cubic root of 109439439 is about 478.3266952531.

The spelling of 109439439 in words is "one hundred nine million, four hundred thirty-nine thousand, four hundred thirty-nine".