672161673 has 4 divisors (see below), whose sum is σ = 896215568. Its totient is φ = 448107780.

The previous prime is 672161669. The next prime is 672161687. The reversal of 672161673 is 376161276.

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 not a de Polignac number, because 672161673 - 2² = 672161669 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (672161603) 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, 112026943 + ... + 112026948.

It is an arithmetic number, because the mean of its divisors is an integer number (224053892).

Almost surely, 2^672161673 is an apocalyptic number.

It is an amenable number.

672161673 is a deficient number, since it is larger than the sum of its proper divisors (224053895).

672161673 is a wasteful number, since it uses less digits than its factorization.

672161673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224053894.

The product of its digits is 63504, while the sum is 39.

The square root of 672161673 is about 25926.0809417852. The cubic root of 672161673 is about 875.9740654005.

The spelling of 672161673 in words is "six hundred seventy-two million, one hundred sixty-one thousand, six hundred seventy-three".