672742723 has 8 divisors (see below), whose sum is σ = 680853600. Its totient is φ = 664644288.

The previous prime is 672742703. The next prime is 672742729. The reversal of 672742723 is 327247276.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-672742723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (672742729) 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 7 ways as a sum of consecutive naturals, for example, 149890 + ... + 154312.

It is an arithmetic number, because the mean of its divisors is an integer number (85106700).

Almost surely, 2^672742723 is an apocalyptic number.

672742723 is a deficient number, since it is larger than the sum of its proper divisors (8110877).

672742723 is a wasteful number, since it uses less digits than its factorization.

672742723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6221.

The product of its digits is 197568, while the sum is 40.

The square root of 672742723 is about 25937.2844183812. The cubic root of 672742723 is about 876.2264045612.

Adding to 672742723 its reverse (327247276), we get a palindrome (999989999).

The spelling of 672742723 in words is "six hundred seventy-two million, seven hundred forty-two thousand, seven hundred twenty-three".