3139966 has 4 divisors (see below), whose sum is σ = 4709952. Its totient is φ = 1569982.

The previous prime is 3139943. The next prime is 3139967. The reversal of 3139966 is 6699313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6699313 = 2437 ⋅2749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3139967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 784990 + ... + 784993.

It is an arithmetic number, because the mean of its divisors is an integer number (1177488).

Almost surely, 2^3139966 is an apocalyptic number.

3139966 is a deficient number, since it is larger than the sum of its proper divisors (1569986).

3139966 is a wasteful number, since it uses less digits than its factorization.

3139966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1569985.

The product of its digits is 26244, while the sum is 37.

The square root of 3139966 is about 1771.9949209859. The cubic root of 3139966 is about 146.4339065165.

The spelling of 3139966 in words is "three million, one hundred thirty-nine thousand, nine hundred sixty-six".