1031313 has 4 divisors (see below), whose sum is σ = 1375088. Its totient is φ = 687540.

The previous prime is 1031309. The next prime is 1031323. The reversal of 1031313 is 3131301.

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: 3131301 = 3 ⋅1043767.

It is not a de Polignac number, because 1031313 - 2² = 1031309 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1031323) 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, 171883 + ... + 171888.

It is an arithmetic number, because the mean of its divisors is an integer number (343772).

2^1031313 is an apocalyptic number.

It is an amenable number.

1031313 is a deficient number, since it is larger than the sum of its proper divisors (343775).

1031313 is an equidigital number, since it uses as much as digits as its factorization.

1031313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343774.

The product of its (nonzero) digits is 27, while the sum is 12.

The square root of 1031313 is about 1015.5358191615. The cubic root of 1031313 is about 101.0330578322.

Subtracting from 1031313 its sum of digits (12), we obtain a palindrome (1031301).

Adding to 1031313 its reverse (3131301), we get a palindrome (4162614).

The spelling of 1031313 in words is "one million, thirty-one thousand, three hundred thirteen".