670591973 has 2 divisors, whose sum is σ = 670591974. Its totient is φ = 670591972.

The previous prime is 670591951. The next prime is 670591993. The reversal of 670591973 is 379195076.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 466473604 + 204118369 = 21598^2 + 14287^2 .

It is a cyclic number.

It is not a de Polignac number, because 670591973 - 2⁸ = 670591717 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (670591913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335295986 + 335295987.

It is an arithmetic number, because the mean of its divisors is an integer number (335295987).

Almost surely, 2^670591973 is an apocalyptic number.

It is an amenable number.

670591973 is a deficient number, since it is larger than the sum of its proper divisors (1).

670591973 is an equidigital number, since it uses as much as digits as its factorization.

670591973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 357210, while the sum is 47.

The square root of 670591973 is about 25895.7906424963. The cubic root of 670591973 is about 875.2916461276.

The spelling of 670591973 in words is "six hundred seventy million, five hundred ninety-one thousand, nine hundred seventy-three".