722887 has 4 divisors (see below), whose sum is σ = 788616. Its totient is φ = 657160.

The previous prime is 722881. The next prime is 722899. The reversal of 722887 is 788227.

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

It is a cyclic number.

It is not a de Polignac number, because 722887 - 2¹⁵ = 690119 is a prime.

It is a super-2 number, since 2×722887² = 1045131229538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32848 + ... + 32869.

It is an arithmetic number, because the mean of its divisors is an integer number (197154).

2⁷²²⁸⁸⁷ is an apocalyptic number.

722887 is a deficient number, since it is larger than the sum of its proper divisors (65729).

722887 is a wasteful number, since it uses less digits than its factorization.

722887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65728.

The product of its digits is 12544, while the sum is 34.

The square root of 722887 is about 850.2276165828. The cubic root of 722887 is about 89.7477297605.

The spelling of 722887 in words is "seven hundred twenty-two thousand, eight hundred eighty-seven".