3139429 has 4 divisors (see below), whose sum is σ = 3147660. Its totient is φ = 3131200.

The previous prime is 3139421. The next prime is 3139447. The reversal of 3139429 is 9249313.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1988100 + 1151329 = 1410^2 + 1073^2 .

It is a cyclic number.

It is not a de Polignac number, because 3139429 - 2³ = 3139421 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

3139429 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3139429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3139421) 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, 3514 + ... + 4315.

It is an arithmetic number, because the mean of its divisors is an integer number (786915).

Almost surely, 2^3139429 is an apocalyptic number.

It is an amenable number.

3139429 is a deficient number, since it is larger than the sum of its proper divisors (8231).

3139429 is an equidigital number, since it uses as much as digits as its factorization.

3139429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8230.

The product of its digits is 5832, while the sum is 31.

The square root of 3139429 is about 1771.8433903706. The cubic root of 3139429 is about 146.4255582848.

The spelling of 3139429 in words is "three million, one hundred thirty-nine thousand, four hundred twenty-nine".