672721037 has 4 divisors (see below), whose sum is σ = 673054620. Its totient is φ = 672387456.

The previous prime is 672721031. The next prime is 672721067. The reversal of 672721037 is 730127276.

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 540609001 + 132112036 = 23251^2 + 11494^2 .

It is a cyclic number.

It is not a de Polignac number, because 672721037 - 2⁸ = 672720781 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 672720988 and 672721006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672721031) 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, 163748 + ... + 167805.

It is an arithmetic number, because the mean of its divisors is an integer number (168263655).

Almost surely, 2^672721037 is an apocalyptic number.

It is an amenable number.

672721037 is a deficient number, since it is larger than the sum of its proper divisors (333583).

672721037 is a wasteful number, since it uses less digits than its factorization.

672721037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333582.

The product of its (nonzero) digits is 24696, while the sum is 35.

The square root of 672721037 is about 25936.8663681641. The cubic root of 672721037 is about 876.2169893473.

The spelling of 672721037 in words is "six hundred seventy-two million, seven hundred twenty-one thousand, thirty-seven".