673623161 has 4 divisors (see below), whose sum is σ = 679803300. Its totient is φ = 667443024.

The previous prime is 673623151. The next prime is 673623187. The reversal of 673623161 is 161326376.

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 192654400 + 480968761 = 13880^2 + 21931^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-673623161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (673623151) 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, 3089906 + ... + 3090123.

It is an arithmetic number, because the mean of its divisors is an integer number (169950825).

Almost surely, 2^673623161 is an apocalyptic number.

It is an amenable number.

673623161 is a deficient number, since it is larger than the sum of its proper divisors (6180139).

673623161 is a wasteful number, since it uses less digits than its factorization.

673623161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6180138.

The product of its digits is 27216, while the sum is 35.

The square root of 673623161 is about 25954.2513087933. The cubic root of 673623161 is about 876.6084856034.

The spelling of 673623161 in words is "six hundred seventy-three million, six hundred twenty-three thousand, one hundred sixty-one".