722973 has 8 divisors (see below), whose sum is σ = 982368. Its totient is φ = 472784.

The previous prime is 722971. The next prime is 722977. The reversal of 722973 is 379227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 722973 - 2¹ = 722971 is a prime.

722973 is a lucky number.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 722973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2115 + ... + 2432.

It is an arithmetic number, because the mean of its divisors is an integer number (122796).

2⁷²²⁹⁷³ is an apocalyptic number.

It is an amenable number.

722973 is a deficient number, since it is larger than the sum of its proper divisors (259395).

722973 is a wasteful number, since it uses less digits than its factorization.

722973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4603.

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

The square root of 722973 is about 850.2781897709. The cubic root of 722973 is about 89.7512886380.

Adding to 722973 its sum of digits (30), we get a triangular number (723003 = T₁₂₀₂).

The spelling of 722973 in words is "seven hundred twenty-two thousand, nine hundred seventy-three".