313728407 has 4 divisors (see below), whose sum is σ = 315542040. Its totient is φ = 311914776.

The previous prime is 313728391. The next prime is 313728413. The reversal of 313728407 is 704827313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 704827313 = 4943 ⋅142591.

It is a cyclic number.

It is not a de Polignac number, because 313728407 - 2⁴ = 313728391 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 (313728497) 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, 906557 + ... + 906902.

It is an arithmetic number, because the mean of its divisors is an integer number (78885510).

Almost surely, 2^313728407 is an apocalyptic number.

313728407 is a deficient number, since it is larger than the sum of its proper divisors (1813633).

313728407 is a wasteful number, since it uses less digits than its factorization.

313728407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1813632.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 313728407 is about 17712.3800489940. The cubic root of 313728407 is about 679.4924174922.

The spelling of 313728407 in words is "three hundred thirteen million, seven hundred twenty-eight thousand, four hundred seven".