1268320719 has 4 divisors (see below), whose sum is σ = 1691094296. Its totient is φ = 845547144.

The previous prime is 1268320663. The next prime is 1268320721. The reversal of 1268320719 is 9170238621.

1268320719 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1268320719 - 2⁷ = 1268320591 is a prime.

It is a super-2 number, since 2×1268320719² = 3217274892489353922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268320769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211386784 + ... + 211386789.

It is an arithmetic number, because the mean of its divisors is an integer number (422773574).

Almost surely, 2^1268320719 is an apocalyptic number.

1268320719 is a deficient number, since it is larger than the sum of its proper divisors (422773577).

1268320719 is an equidigital number, since it uses as much as digits as its factorization.

1268320719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422773576.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 1268320719 is about 35613.4906882209. The cubic root of 1268320719 is about 1082.4546132834.

The spelling of 1268320719 in words is "one billion, two hundred sixty-eight million, three hundred twenty thousand, seven hundred nineteen".