313135643 has 8 divisors (see below), whose sum is σ = 314584320. Its totient is φ = 311691240.

The previous prime is 313135577. The next prime is 313135651. The reversal of 313135643 is 346531313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313135643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313135663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306788 + ... + 307806.

It is an arithmetic number, because the mean of its divisors is an integer number (39323040).

Almost surely, 2^313135643 is an apocalyptic number.

313135643 is a deficient number, since it is larger than the sum of its proper divisors (1448677).

313135643 is a wasteful number, since it uses less digits than its factorization.

313135643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2137.

The product of its digits is 9720, while the sum is 29.

The square root of 313135643 is about 17695.6390955512. The cubic root of 313135643 is about 679.0641993547.

Adding to 313135643 its reverse (346531313), we get a palindrome (659666956).

The spelling of 313135643 in words is "three hundred thirteen million, one hundred thirty-five thousand, six hundred forty-three".