672520723 has 4 divisors (see below), whose sum is σ = 768595120. Its totient is φ = 576446328.

The previous prime is 672520711. The next prime is 672520729. The reversal of 672520723 is 327025276.

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 672520723 - 2²¹ = 670423571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (672520729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48037188 + ... + 48037201.

It is an arithmetic number, because the mean of its divisors is an integer number (192148780).

Almost surely, 2^672520723 is an apocalyptic number.

672520723 is a deficient number, since it is larger than the sum of its proper divisors (96074397).

672520723 is an equidigital number, since it uses as much as digits as its factorization.

672520723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96074396.

The product of its (nonzero) digits is 35280, while the sum is 34.

The square root of 672520723 is about 25933.0045116257. The cubic root of 672520723 is about 876.1300112665.

Adding to 672520723 its reverse (327025276), we get a palindrome (999545999).

The spelling of 672520723 in words is "six hundred seventy-two million, five hundred twenty thousand, seven hundred twenty-three".