319198639 has 2 divisors, whose sum is σ = 319198640. Its totient is φ = 319198638.

The previous prime is 319198619. The next prime is 319198643. The reversal of 319198639 is 936891913.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 319198639 - 2¹³ = 319190447 is a prime.

It is a super-2 number, since 2×319198639² = 203775542278904642, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 319198592 and 319198601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (319198619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159599319 + 159599320.

It is an arithmetic number, because the mean of its divisors is an integer number (159599320).

Almost surely, 2^319198639 is an apocalyptic number.

319198639 is a deficient number, since it is larger than the sum of its proper divisors (1).

319198639 is an equidigital number, since it uses as much as digits as its factorization.

319198639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 314928, while the sum is 49.

The square root of 319198639 is about 17866.1310585140. The cubic root of 319198639 is about 683.4189397145.

The spelling of 319198639 in words is "three hundred nineteen million, one hundred ninety-eight thousand, six hundred thirty-nine".