109071399 has 4 divisors (see below), whose sum is σ = 145428536. Its totient is φ = 72714264.

The previous prime is 109071397. The next prime is 109071421. The reversal of 109071399 is 993170901.

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

It is not a de Polignac number, because 109071399 - 2¹ = 109071397 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 (109071397) 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, 18178564 + ... + 18178569.

It is an arithmetic number, because the mean of its divisors is an integer number (36357134).

Almost surely, 2^109071399 is an apocalyptic number.

109071399 is a deficient number, since it is larger than the sum of its proper divisors (36357137).

109071399 is an equidigital number, since it uses as much as digits as its factorization.

109071399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36357136.

The product of its (nonzero) digits is 15309, while the sum is 39.

The square root of 109071399 is about 10443.7253410840. The cubic root of 109071399 is about 477.7898958748.

The spelling of 109071399 in words is "one hundred nine million, seventy-one thousand, three hundred ninety-nine".