319660613 has 2 divisors, whose sum is σ = 319660614. Its totient is φ = 319660612.

The previous prime is 319660573. The next prime is 319660631. The reversal of 319660613 is 316066913.

Together with next prime (319660631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 232928644 + 86731969 = 15262^2 + 9313^2 .

It is a cyclic number.

It is not a de Polignac number, because 319660613 - 2²⁰ = 318612037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (319660213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159830306 + 159830307.

It is an arithmetic number, because the mean of its divisors is an integer number (159830307).

Almost surely, 2^319660613 is an apocalyptic number.

It is an amenable number.

319660613 is a deficient number, since it is larger than the sum of its proper divisors (1).

319660613 is an equidigital number, since it uses as much as digits as its factorization.

319660613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 319660613 is about 17879.0551484132. The cubic root of 319660613 is about 683.7484832976.

The spelling of 319660613 in words is "three hundred nineteen million, six hundred sixty thousand, six hundred thirteen".