672364421 has 4 divisors (see below), whose sum is σ = 673338144. Its totient is φ = 671390700.

The previous prime is 672364417. The next prime is 672364423. The reversal of 672364421 is 124463276.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 672364421 - 2² = 672364417 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 (672364423) 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, 485825 + ... + 487206.

It is an arithmetic number, because the mean of its divisors is an integer number (168334536).

Almost surely, 2^672364421 is an apocalyptic number.

It is an amenable number.

672364421 is a deficient number, since it is larger than the sum of its proper divisors (973723).

672364421 is an equidigital number, since it uses as much as digits as its factorization.

672364421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973722.

The product of its digits is 48384, while the sum is 35.

The square root of 672364421 is about 25929.9907635926. The cubic root of 672364421 is about 876.0621315821.

The spelling of 672364421 in words is "six hundred seventy-two million, three hundred sixty-four thousand, four hundred twenty-one".