672572639 has 4 divisors (see below), whose sum is σ = 673558056. Its totient is φ = 671587224.

The previous prime is 672572633. The next prime is 672572671. The reversal of 672572639 is 936275276.

It is a happy number.

672572639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 672572639 - 2¹⁶ = 672507103 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 672572593 and 672572602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672572633) 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, 491684 + ... + 493049.

It is an arithmetic number, because the mean of its divisors is an integer number (168389514).

Almost surely, 2^672572639 is an apocalyptic number.

672572639 is a deficient number, since it is larger than the sum of its proper divisors (985417).

672572639 is an equidigital number, since it uses as much as digits as its factorization.

672572639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985416.

The product of its digits is 952560, while the sum is 47.

The square root of 672572639 is about 25934.0054561574. The cubic root of 672572639 is about 876.1525553030.

It can be divided in two parts, 67257 and 2639, that added together give a palindrome (69896).

The spelling of 672572639 in words is "six hundred seventy-two million, five hundred seventy-two thousand, six hundred thirty-nine".