3139643 has 4 divisors (see below), whose sum is σ = 3381168. Its totient is φ = 2898120.

The previous prime is 3139639. The next prime is 3139651. The reversal of 3139643 is 3469313.

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

It is a cyclic number.

It is not a de Polignac number, because 3139643 - 2² = 3139639 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 (3139663) 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, 120743 + ... + 120768.

It is an arithmetic number, because the mean of its divisors is an integer number (845292).

Almost surely, 2^3139643 is an apocalyptic number.

3139643 is a deficient number, since it is larger than the sum of its proper divisors (241525).

3139643 is a wasteful number, since it uses less digits than its factorization.

3139643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241524.

The product of its digits is 5832, while the sum is 29.

The square root of 3139643 is about 1771.9037784259. The cubic root of 3139643 is about 146.4288852547.

The spelling of 3139643 in words is "three million, one hundred thirty-nine thousand, six hundred forty-three".