722923 has 4 divisors (see below), whose sum is σ = 724680. Its totient is φ = 721168.

The previous prime is 722921. The next prime is 722933. The reversal of 722923 is 329227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 329227 = 71 ⋅4637.

It is a cyclic number.

It is not a de Polignac number, because 722923 - 2¹ = 722921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722921) 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, 111 + ... + 1207.

It is an arithmetic number, because the mean of its divisors is an integer number (181170).

2⁷²²⁹²³ is an apocalyptic number.

722923 is a deficient number, since it is larger than the sum of its proper divisors (1757).

722923 is a wasteful number, since it uses less digits than its factorization.

722923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1756.

The product of its digits is 1512, while the sum is 25.

The square root of 722923 is about 850.2487871206. The cubic root of 722923 is about 89.7492195575.

It can be divided in two parts, 7 and 22923, that multiplied together give a triangular number (160461 = T₅₆₆).

The spelling of 722923 in words is "seven hundred twenty-two thousand, nine hundred twenty-three".