672111617 has 2 divisors, whose sum is σ = 672111618. Its totient is φ = 672111616.

The previous prime is 672111611. The next prime is 672111653. The reversal of 672111617 is 716111276.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 589955521 + 82156096 = 24289^2 + 9064^2 .

It is a cyclic number.

It is not a de Polignac number, because 672111617 - 2⁶ = 672111553 is a prime.

It is not a weakly prime, because it can be changed into another prime (672111611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336055808 + 336055809.

It is an arithmetic number, because the mean of its divisors is an integer number (336055809).

Almost surely, 2^672111617 is an apocalyptic number.

It is an amenable number.

672111617 is a deficient number, since it is larger than the sum of its proper divisors (1).

672111617 is an equidigital number, since it uses as much as digits as its factorization.

672111617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3528, while the sum is 32.

The square root of 672111617 is about 25925.1155638697. The cubic root of 672111617 is about 875.9523202123.

The spelling of 672111617 in words is "six hundred seventy-two million, one hundred eleven thousand, six hundred seventeen".