722897 has 6 divisors (see below), whose sum is σ = 840978. Its totient is φ = 619584.

The previous prime is 722881. The next prime is 722899. The reversal of 722897 is 798227.

722897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 614656 + 108241 = 784^2 + 329^2 .

It is not a de Polignac number, because 722897 - 2⁴ = 722881 is a prime.

It is a super-3 number, since 3×722897³ = 1133314700246484819, which contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722899) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7328 + ... + 7425.

It is an arithmetic number, because the mean of its divisors is an integer number (140163).

2⁷²²⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

722897 is a deficient number, since it is larger than the sum of its proper divisors (118081).

722897 is a wasteful number, since it uses less digits than its factorization.

722897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14767 (or 14760 counting only the distinct ones).

The product of its digits is 14112, while the sum is 35.

The square root of 722897 is about 850.2334973406. The cubic root of 722897 is about 89.7481435980.

The spelling of 722897 in words is "seven hundred twenty-two thousand, eight hundred ninety-seven".