723675217 has 4 divisors (see below), whose sum is σ = 723729060. Its totient is φ = 723621376.

The previous prime is 723675187. The next prime is 723675223. The reversal of 723675217 is 712576327.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 706709056 + 16966161 = 26584^2 + 4119^2 .

It is a cyclic number.

It is not a de Polignac number, because 723675217 - 2¹¹ = 723673169 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 723675217.

It is not an unprimeable number, because it can be changed into a prime (723675517) 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, 11913 + ... + 39865.

It is an arithmetic number, because the mean of its divisors is an integer number (180932265).

Almost surely, 2^723675217 is an apocalyptic number.

It is an amenable number.

723675217 is a deficient number, since it is larger than the sum of its proper divisors (53843).

723675217 is a wasteful number, since it uses less digits than its factorization.

723675217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53842.

The product of its digits is 123480, while the sum is 40.

The square root of 723675217 is about 26901.2121845838. The cubic root of 723675217 is about 897.8033743438.

The spelling of 723675217 in words is "seven hundred twenty-three million, six hundred seventy-five thousand, two hundred seventeen".