313720019 has 4 divisors (see below), whose sum is σ = 316954344. Its totient is φ = 310485696.

The previous prime is 313720009. The next prime is 313720037. The reversal of 313720019 is 910027313.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313720019 is a prime.

It is a super-2 number, since 2×313720019² = 196840500642720722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 313720019.

It is not an unprimeable number, because it can be changed into a prime (313720009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1617017 + ... + 1617210.

It is an arithmetic number, because the mean of its divisors is an integer number (79238586).

Almost surely, 2^313720019 is an apocalyptic number.

313720019 is a deficient number, since it is larger than the sum of its proper divisors (3234325).

313720019 is an equidigital number, since it uses as much as digits as its factorization.

313720019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3234324.

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 313720019 is about 17712.1432638741. The cubic root of 313720019 is about 679.4863616882.

The spelling of 313720019 in words is "three hundred thirteen million, seven hundred twenty thousand, nineteen".