319374721 has 2 divisors, whose sum is σ = 319374722. Its totient is φ = 319374720.

The previous prime is 319374719. The next prime is 319374739. The reversal of 319374721 is 127473913.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 178596496 + 140778225 = 13364^2 + 11865^2 .

It is a cyclic number.

It is not a de Polignac number, because 319374721 - 2¹ = 319374719 is a prime.

Together with 319374719, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (319374701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159687360 + 159687361.

It is an arithmetic number, because the mean of its divisors is an integer number (159687361).

Almost surely, 2^319374721 is an apocalyptic number.

It is an amenable number.

319374721 is a deficient number, since it is larger than the sum of its proper divisors (1).

319374721 is an equidigital number, since it uses as much as digits as its factorization.

319374721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31752, while the sum is 37.

The square root of 319374721 is about 17871.0581947461. The cubic root of 319374721 is about 683.5445831626.

The spelling of 319374721 in words is "three hundred nineteen million, three hundred seventy-four thousand, seven hundred twenty-one".