723497773 has 4 divisors (see below), whose sum is σ = 727539840. Its totient is φ = 719455708.

The previous prime is 723497701. The next prime is 723497777. The reversal of 723497773 is 377794327.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 377794327 = 109 ⋅3466003.

It is a cyclic number.

It is not a de Polignac number, because 723497773 - 2²⁵ = 689943341 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723497777) 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, 2020765 + ... + 2021122.

It is an arithmetic number, because the mean of its divisors is an integer number (181884960).

Almost surely, 2^723497773 is an apocalyptic number.

It is an amenable number.

723497773 is a deficient number, since it is larger than the sum of its proper divisors (4042067).

723497773 is a wasteful number, since it uses less digits than its factorization.

723497773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4042066.

The product of its digits is 1555848, while the sum is 49.

The square root of 723497773 is about 26897.9139153950. The cubic root of 723497773 is about 897.7299883640.

The spelling of 723497773 in words is "seven hundred twenty-three million, four hundred ninety-seven thousand, seven hundred seventy-three".