3139897 has 4 divisors (see below), whose sum is σ = 3241216. Its totient is φ = 3038580.

The previous prime is 3139889. The next prime is 3139901. The reversal of 3139897 is 7989313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7989313 = 173 ⋅46181.

It is a cyclic number.

It is not a de Polignac number, because 3139897 - 2³ = 3139889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3139837) 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, 50613 + ... + 50674.

It is an arithmetic number, because the mean of its divisors is an integer number (810304).

Almost surely, 2^3139897 is an apocalyptic number.

It is an amenable number.

3139897 is a deficient number, since it is larger than the sum of its proper divisors (101319).

3139897 is a wasteful number, since it uses less digits than its factorization.

3139897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101318.

The product of its digits is 40824, while the sum is 40.

The square root of 3139897 is about 1771.9754512972. The cubic root of 3139897 is about 146.4328338920.

The spelling of 3139897 in words is "three million, one hundred thirty-nine thousand, eight hundred ninety-seven".