722879819 has 2 divisors, whose sum is σ = 722879820. Its totient is φ = 722879818.

The previous prime is 722879779. The next prime is 722879821. The reversal of 722879819 is 918978227.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (918978227) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 722879819 - 2²⁴ = 706102603 is a prime.

It is a super-2 number, since 2×722879819² = 1045110465434945522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 722879821, 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 (722879849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361439909 + 361439910.

It is an arithmetic number, because the mean of its divisors is an integer number (361439910).

Almost surely, 2^722879819 is an apocalyptic number.

722879819 is a deficient number, since it is larger than the sum of its proper divisors (1).

722879819 is an equidigital number, since it uses as much as digits as its factorization.

722879819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 53.

The square root of 722879819 is about 26886.4244368789. The cubic root of 722879819 is about 897.4743258149.

The spelling of 722879819 in words is "seven hundred twenty-two million, eight hundred seventy-nine thousand, eight hundred nineteen".