3138139 has 4 divisors (see below), whose sum is σ = 3144424. Its totient is φ = 3131856.

The previous prime is 3138137. The next prime is 3138167. The reversal of 3138139 is 9318313.

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 3138139 - 2¹ = 3138137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3138131) 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, 2322 + ... + 3415.

It is an arithmetic number, because the mean of its divisors is an integer number (786106).

Almost surely, 2^3138139 is an apocalyptic number.

3138139 is a deficient number, since it is larger than the sum of its proper divisors (6285).

3138139 is an equidigital number, since it uses as much as digits as its factorization.

3138139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6284.

The product of its digits is 1944, while the sum is 28.

The square root of 3138139 is about 1771.4793253098. The cubic root of 3138139 is about 146.4054999825.

The spelling of 3138139 in words is "three million, one hundred thirty-eight thousand, one hundred thirty-nine".