672604891 has 4 divisors (see below), whose sum is σ = 768691312. Its totient is φ = 576518472.

The previous prime is 672604871. The next prime is 672604931. The reversal of 672604891 is 198406276.

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 672604891 - 2⁷ = 672604763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (672604841) 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, 48043200 + ... + 48043213.

It is an arithmetic number, because the mean of its divisors is an integer number (192172828).

Almost surely, 2^672604891 is an apocalyptic number.

672604891 is a deficient number, since it is larger than the sum of its proper divisors (96086421).

672604891 is an equidigital number, since it uses as much as digits as its factorization.

672604891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96086420.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 672604891 is about 25934.6272577803. The cubic root of 672604891 is about 876.1665598476.

The spelling of 672604891 in words is "six hundred seventy-two million, six hundred four thousand, eight hundred ninety-one".