319621943 has 2 divisors, whose sum is σ = 319621944. Its totient is φ = 319621942.

The previous prime is 319621931. The next prime is 319621957. The reversal of 319621943 is 349126913.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 319621943 - 2¹⁶ = 319556407 is a prime.

It is a Chen prime.

It is equal to p_17255936 and since 319621943 and 17255936 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 319621897 and 319621906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (319621343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159810971 + 159810972.

It is an arithmetic number, because the mean of its divisors is an integer number (159810972).

Almost surely, 2^319621943 is an apocalyptic number.

319621943 is a deficient number, since it is larger than the sum of its proper divisors (1).

319621943 is an equidigital number, since it uses as much as digits as its factorization.

319621943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 38.

The square root of 319621943 is about 17877.9736827192. The cubic root of 319621943 is about 683.7209107003.

The spelling of 319621943 in words is "three hundred nineteen million, six hundred twenty-one thousand, nine hundred forty-three".