671144723 has 8 divisors (see below), whose sum is σ = 683802000. Its totient is φ = 658596448.

The previous prime is 671144707. The next prime is 671144729. The reversal of 671144723 is 327441176.

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

It is a cyclic number.

It is not a de Polignac number, because 671144723 - 2⁴ = 671144707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671144729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14768 + ... + 39501.

It is an arithmetic number, because the mean of its divisors is an integer number (85475250).

Almost surely, 2^671144723 is an apocalyptic number.

671144723 is a deficient number, since it is larger than the sum of its proper divisors (12657277).

671144723 is a wasteful number, since it uses less digits than its factorization.

671144723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54501.

The product of its digits is 28224, while the sum is 35.

The square root of 671144723 is about 25906.4610280910. The cubic root of 671144723 is about 875.5320727981.

Adding to 671144723 its reverse (327441176), we get a palindrome (998585899).

The spelling of 671144723 in words is "six hundred seventy-one million, one hundred forty-four thousand, seven hundred twenty-three".