319047457 has 2 divisors, whose sum is σ = 319047458. Its totient is φ = 319047456.

The previous prime is 319047437. The next prime is 319047479. The reversal of 319047457 is 754740913.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 208398096 + 110649361 = 14436^2 + 10519^2 .

It is an emirp because it is prime and its reverse (754740913) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 319047457 - 2²³ = 310658849 is a prime.

It is not a weakly prime, because it can be changed into another prime (319047437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159523728 + 159523729.

It is an arithmetic number, because the mean of its divisors is an integer number (159523729).

Almost surely, 2^319047457 is an apocalyptic number.

It is an amenable number.

319047457 is a deficient number, since it is larger than the sum of its proper divisors (1).

319047457 is an equidigital number, since it uses as much as digits as its factorization.

319047457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 319047457 is about 17861.8995910289. The cubic root of 319047457 is about 683.3110268084.

The spelling of 319047457 in words is "three hundred nineteen million, forty-seven thousand, four hundred fifty-seven".