672728831 has 2 divisors, whose sum is σ = 672728832. Its totient is φ = 672728830.

The previous prime is 672728827. The next prime is 672728897. The reversal of 672728831 is 138827276.

It is a happy number.

672728831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 672728831 - 2² = 672728827 is a prime.

It is a super-2 number, since 2×672728831² = 905128160117253122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (672728821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336364415 + 336364416.

It is an arithmetic number, because the mean of its divisors is an integer number (336364416).

Almost surely, 2^672728831 is an apocalyptic number.

672728831 is a deficient number, since it is larger than the sum of its proper divisors (1).

672728831 is an equidigital number, since it uses as much as digits as its factorization.

672728831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 44.

The square root of 672728831 is about 25937.0166171825. The cubic root of 672728831 is about 876.2203732208.

The spelling of 672728831 in words is "six hundred seventy-two million, seven hundred twenty-eight thousand, eight hundred thirty-one".