722399 has 8 divisors (see below), whose sum is σ = 768240. Its totient is φ = 677376.

The previous prime is 722389. The next prime is 722411. The reversal of 722399 is 993227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 722399 - 2¹² = 718303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3569 + ... + 3765.

It is an arithmetic number, because the mean of its divisors is an integer number (96030).

2⁷²²³⁹⁹ is an apocalyptic number.

722399 is a deficient number, since it is larger than the sum of its proper divisors (45841).

722399 is a wasteful number, since it uses less digits than its factorization.

722399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409.

The product of its digits is 6804, while the sum is 32.

The square root of 722399 is about 849.9405861588. The cubic root of 722399 is about 89.7275298532.

The spelling of 722399 in words is "seven hundred twenty-two thousand, three hundred ninety-nine".