672101609 has 2 divisors, whose sum is σ = 672101610. Its totient is φ = 672101608.

The previous prime is 672101597. The next prime is 672101621. The reversal of 672101609 is 906101276.

It is a happy number.

672101609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (672101597) and next prime (672101621).

It can be written as a sum of positive squares in only one way, i.e., 450925225 + 221176384 = 21235^2 + 14872^2 .

It is a cyclic number.

It is not a de Polignac number, because 672101609 - 2²⁴ = 655324393 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (672101629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336050804 + 336050805.

It is an arithmetic number, because the mean of its divisors is an integer number (336050805).

Almost surely, 2^672101609 is an apocalyptic number.

It is an amenable number.

672101609 is a deficient number, since it is larger than the sum of its proper divisors (1).

672101609 is an equidigital number, since it uses as much as digits as its factorization.

672101609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 672101609 is about 25924.9225456895. The cubic root of 672101609 is about 875.9479724353.

The spelling of 672101609 in words is "six hundred seventy-two million, one hundred one thousand, six hundred nine".