672640433 has 2 divisors, whose sum is σ = 672640434. Its totient is φ = 672640432.

The previous prime is 672640391. The next prime is 672640447. The reversal of 672640433 is 334046276.

672640433 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 658025104 + 14615329 = 25652^2 + 3823^2 .

It is a cyclic number.

It is not a de Polignac number, because 672640433 - 2¹⁴ = 672624049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 672640393 and 672640402.

It is not a weakly prime, because it can be changed into another prime (672640333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336320216 + 336320217.

It is an arithmetic number, because the mean of its divisors is an integer number (336320217).

Almost surely, 2^672640433 is an apocalyptic number.

It is an amenable number.

672640433 is a deficient number, since it is larger than the sum of its proper divisors (1).

672640433 is an equidigital number, since it uses as much as digits as its factorization.

672640433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 35.

The square root of 672640433 is about 25935.3124716091. The cubic root of 672640433 is about 876.1819924658.

The spelling of 672640433 in words is "six hundred seventy-two million, six hundred forty thousand, four hundred thirty-three".