672223445 has 4 divisors (see below), whose sum is σ = 806668140. Its totient is φ = 537778752.

The previous prime is 672223441. The next prime is 672223459. The reversal of 672223445 is 544322276.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 525280561 + 146942884 = 22919^2 + 12122^2 .

It is a cyclic number.

It is not a de Polignac number, because 672223445 - 2² = 672223441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672223441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67222340 + ... + 67222349.

It is an arithmetic number, because the mean of its divisors is an integer number (201667035).

Almost surely, 2^672223445 is an apocalyptic number.

It is an amenable number.

672223445 is a deficient number, since it is larger than the sum of its proper divisors (134444695).

672223445 is a wasteful number, since it uses less digits than its factorization.

672223445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134444694.

The product of its digits is 80640, while the sum is 35.

The square root of 672223445 is about 25927.2722244358. The cubic root of 672223445 is about 876.0008987328. Note that the first 3 decimals are identical.

The spelling of 672223445 in words is "six hundred seventy-two million, two hundred twenty-three thousand, four hundred forty-five".