313135687 has 4 divisors (see below), whose sum is σ = 313916976. Its totient is φ = 312354400.

The previous prime is 313135673. The next prime is 313135729. The reversal of 313135687 is 786531313.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 786531313 = 2963 ⋅265451.

It is a cyclic number.

It is not a de Polignac number, because 313135687 - 2¹⁹ = 312611399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313135987) 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, 390043 + ... + 390844.

It is an arithmetic number, because the mean of its divisors is an integer number (78479244).

Almost surely, 2^313135687 is an apocalyptic number.

313135687 is a deficient number, since it is larger than the sum of its proper divisors (781289).

313135687 is an equidigital number, since it uses as much as digits as its factorization.

313135687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781288.

The product of its digits is 45360, while the sum is 37.

The square root of 313135687 is about 17695.6403387953. The cubic root of 313135687 is about 679.0642311608.

The spelling of 313135687 in words is "three hundred thirteen million, one hundred thirty-five thousand, six hundred eighty-seven".