672223789 has 4 divisors (see below), whose sum is σ = 672399324. Its totient is φ = 672048256.

The previous prime is 672223729. The next prime is 672223793. The reversal of 672223789 is 987322276.

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 529230025 + 142993764 = 23005^2 + 11958^2 .

It is a cyclic number.

It is not a de Polignac number, because 672223789 - 2⁷ = 672223661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672223709) 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, 81892 + ... + 89725.

It is an arithmetic number, because the mean of its divisors is an integer number (168099831).

Almost surely, 2^672223789 is an apocalyptic number.

It is an amenable number.

672223789 is a deficient number, since it is larger than the sum of its proper divisors (175535).

672223789 is a wasteful number, since it uses less digits than its factorization.

672223789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175534.

The product of its digits is 508032, while the sum is 46.

The square root of 672223789 is about 25927.2788583762. The cubic root of 672223789 is about 876.0010481594.

The spelling of 672223789 in words is "six hundred seventy-two million, two hundred twenty-three thousand, seven hundred eighty-nine".