319693643 has 2 divisors, whose sum is σ = 319693644. Its totient is φ = 319693642.

The previous prime is 319693589. The next prime is 319693657. The reversal of 319693643 is 346396913.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 319693643 - 2¹⁸ = 319431499 is a prime.

It is a super-2 number, since 2×319693643² = 204408050749222898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 319693594 and 319693603.

It is not a weakly prime, because it can be changed into another prime (319693663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159846821 + 159846822.

It is an arithmetic number, because the mean of its divisors is an integer number (159846822).

Almost surely, 2^319693643 is an apocalyptic number.

319693643 is a deficient number, since it is larger than the sum of its proper divisors (1).

319693643 is an equidigital number, since it uses as much as digits as its factorization.

319693643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 314928, while the sum is 44.

The square root of 319693643 is about 17879.9788310837. The cubic root of 319693643 is about 683.7720326847.

The spelling of 319693643 in words is "three hundred nineteen million, six hundred ninety-three thousand, six hundred forty-three".