722593 has 4 divisors (see below), whose sum is σ = 747540. Its totient is φ = 697648.

The previous prime is 722581. The next prime is 722599. The reversal of 722593 is 395227.

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

It can be written as a sum of positive squares in 2 ways, for example, as 439569 + 283024 = 663^2 + 532^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-722593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722599) 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, 12430 + ... + 12487.

It is an arithmetic number, because the mean of its divisors is an integer number (186885).

2⁷²²⁵⁹³ is an apocalyptic number.

It is an amenable number.

722593 is a deficient number, since it is larger than the sum of its proper divisors (24947).

722593 is a wasteful number, since it uses less digits than its factorization.

722593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24946.

The product of its digits is 3780, while the sum is 28.

The square root of 722593 is about 850.0547041220. The cubic root of 722593 is about 89.7355612333.

The spelling of 722593 in words is "seven hundred twenty-two thousand, five hundred ninety-three".