672659973 has 6 divisors (see below), whose sum is σ = 971619974. Its totient is φ = 448439976.

The previous prime is 672659947. The next prime is 672659989. The reversal of 672659973 is 379956276.

672659973 is nontrivially palindromic in base 2 and base 8.

It can be written as a sum of positive squares in only one way, i.e., 634133124 + 38526849 = 25182^2 + 6207^2 .

It is not a de Polignac number, because 672659973 - 2⁹ = 672659461 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672659573) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37369990 + ... + 37370007.

Almost surely, 2^672659973 is an apocalyptic number.

It is an amenable number.

672659973 is a deficient number, since it is larger than the sum of its proper divisors (298960001).

672659973 is a wasteful number, since it uses less digits than its factorization.

672659973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74740003 (or 74740000 counting only the distinct ones).

The product of its digits is 4286520, while the sum is 54.

The square root of 672659973 is about 25935.6891753429. The cubic root of 672659973 is about 876.1904766571.

The spelling of 672659973 in words is "six hundred seventy-two million, six hundred fifty-nine thousand, nine hundred seventy-three".