2108739 has 4 divisors (see below), whose sum is σ = 2811656. Its totient is φ = 1405824.

The previous prime is 2108737. The next prime is 2108759. The reversal of 2108739 is 9378012.

It is a happy number.

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

It is not a de Polignac number, because 2108739 - 2¹ = 2108737 is a prime.

It is a D-number.

It is a Duffinian number.

2108739 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2108737) 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, 351454 + ... + 351459.

It is an arithmetic number, because the mean of its divisors is an integer number (702914).

2^2108739 is an apocalyptic number.

2108739 is a deficient number, since it is larger than the sum of its proper divisors (702917).

2108739 is an equidigital number, since it uses as much as digits as its factorization.

2108739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702916.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 2108739 is about 1452.1497856626. The cubic root of 2108739 is about 128.2353052864.

The spelling of 2108739 in words is "two million, one hundred eight thousand, seven hundred thirty-nine".