672672381 has 4 divisors (see below), whose sum is σ = 896896512. Its totient is φ = 448448252.

The previous prime is 672672361. The next prime is 672672401. The reversal of 672672381 is 183276276.

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 an interprime number because it is at equal distance from previous prime (672672361) and next prime (672672401).

It is a cyclic number.

It is not a de Polignac number, because 672672381 - 2¹⁸ = 672410237 is a prime.

It is a super-2 number, since 2×672672381² = 904976264320418322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672672331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112112061 + ... + 112112066.

It is an arithmetic number, because the mean of its divisors is an integer number (224224128).

Almost surely, 2^672672381 is an apocalyptic number.

It is an amenable number.

672672381 is a deficient number, since it is larger than the sum of its proper divisors (224224131).

672672381 is a wasteful number, since it uses less digits than its factorization.

672672381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224224130.

The product of its digits is 169344, while the sum is 42.

The square root of 672672381 is about 25935.9283813015. The cubic root of 672672381 is about 876.1958640767.

The spelling of 672672381 in words is "six hundred seventy-two million, six hundred seventy-two thousand, three hundred eighty-one".