319463857 has 2 divisors, whose sum is σ = 319463858. Its totient is φ = 319463856.

The previous prime is 319463843. The next prime is 319463867. The reversal of 319463857 is 758364913.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 287099136 + 32364721 = 16944^2 + 5689^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-319463857 is a prime.

It is not a weakly prime, because it can be changed into another prime (319463827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159731928 + 159731929.

It is an arithmetic number, because the mean of its divisors is an integer number (159731929).

Almost surely, 2^319463857 is an apocalyptic number.

It is an amenable number.

319463857 is a deficient number, since it is larger than the sum of its proper divisors (1).

319463857 is an equidigital number, since it uses as much as digits as its factorization.

319463857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 46.

The square root of 319463857 is about 17873.5518853976. The cubic root of 319463857 is about 683.6081686194.

The spelling of 319463857 in words is "three hundred nineteen million, four hundred sixty-three thousand, eight hundred fifty-seven".