722739 has 4 divisors (see below), whose sum is σ = 963656. Its totient is φ = 481824.

The previous prime is 722737. The next prime is 722749. The reversal of 722739 is 937227.

722739 is digitally balanced in base 2, 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 722739 - 2¹ = 722737 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722737) 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, 120454 + ... + 120459.

It is an arithmetic number, because the mean of its divisors is an integer number (240914).

2⁷²²⁷³⁹ is an apocalyptic number.

722739 is a deficient number, since it is larger than the sum of its proper divisors (240917).

722739 is a wasteful number, since it uses less digits than its factorization.

722739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240916.

The product of its digits is 5292, while the sum is 30.

The square root of 722739 is about 850.1405766107. The cubic root of 722739 is about 89.7416045198.

The spelling of 722739 in words is "seven hundred twenty-two thousand, seven hundred thirty-nine".