3129313 has 4 divisors (see below), whose sum is σ = 3413808. Its totient is φ = 2844820.

The previous prime is 3129289. The next prime is 3129323. The reversal of 3129313 is 3139213.

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.

It is not a de Polignac number, because 3129313 - 2¹³ = 3121121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3129323) 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, 142231 + ... + 142252.

It is an arithmetic number, because the mean of its divisors is an integer number (853452).

Almost surely, 2^3129313 is an apocalyptic number.

It is an amenable number.

3129313 is a deficient number, since it is larger than the sum of its proper divisors (284495).

3129313 is a wasteful number, since it uses less digits than its factorization.

3129313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284494.

The product of its digits is 486, while the sum is 22.

The square root of 3129313 is about 1768.9864329610. The cubic root of 3129313 is about 146.2681161964.

Multiplying 3129313 by its sum of digits (22), we get a palindrome (68844886).

The spelling of 3129313 in words is "three million, one hundred twenty-nine thousand, three hundred thirteen".