319717247 has 2 divisors, whose sum is σ = 319717248. Its totient is φ = 319717246.

The previous prime is 319717207. The next prime is 319717261. The reversal of 319717247 is 742717913.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 319717247 - 2⁶ = 319717183 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (319717207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159858623 + 159858624.

It is an arithmetic number, because the mean of its divisors is an integer number (159858624).

Almost surely, 2^319717247 is an apocalyptic number.

319717247 is a deficient number, since it is larger than the sum of its proper divisors (1).

319717247 is an equidigital number, since it uses as much as digits as its factorization.

319717247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 74088, while the sum is 41.

The square root of 319717247 is about 17880.6388867960. The cubic root of 319717247 is about 683.7888606263.

The spelling of 319717247 in words is "three hundred nineteen million, seven hundred seventeen thousand, two hundred forty-seven".