3209139 has 10 divisors (see below), whose sum is σ = 4794020. Its totient is φ = 2139372.

The previous prime is 3209131. The next prime is 3209147. The reversal of 3209139 is 9319023.

It is an interprime number because it is at equal distance from previous prime (3209131) and next prime (3209147).

It is not a de Polignac number, because 3209139 - 2³ = 3209131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

3209139 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3209131) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 19729 + ... + 19890.

It is an arithmetic number, because the mean of its divisors is an integer number (479402).

Almost surely, 2^3209139 is an apocalyptic number.

3209139 is a deficient number, since it is larger than the sum of its proper divisors (1584881).

3209139 is an equidigital number, since it uses as much as digits as its factorization.

3209139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39631 (or 39622 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 3209139 is about 1791.4069889336. The cubic root of 3209139 is about 147.5014114583.

Subtracting from 3209139 its product of nonzero digits (1458), we obtain a square (3207681 = 1791²).

The spelling of 3209139 in words is "three million, two hundred nine thousand, one hundred thirty-nine".