7431313 has 4 divisors (see below), whose sum is σ = 7437808. Its totient is φ = 7424820.

The previous prime is 7431283. The next prime is 7431331. The reversal of 7431313 is 3131347.

It is a happy number.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3131347 = 37 ⋅84631.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7431313 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7431343) 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, 1023 + ... + 3988.

It is an arithmetic number, because the mean of its divisors is an integer number (1859452).

Almost surely, 2^7431313 is an apocalyptic number.

It is an amenable number.

7431313 is a deficient number, since it is larger than the sum of its proper divisors (6495).

7431313 is a wasteful number, since it uses less digits than its factorization.

7431313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6494.

The product of its digits is 756, while the sum is 22.

The square root of 7431313 is about 2726.0434699395. The cubic root of 7431313 is about 195.1439918285.

It can be divided in two parts, 7431 and 313, that added together give a square (7744 = 88²).

The spelling of 7431313 in words is "seven million, four hundred thirty-one thousand, three hundred thirteen".