672825917 has 2 divisors, whose sum is σ = 672825918. Its totient is φ = 672825916.

The previous prime is 672825893. The next prime is 672825931. The reversal of 672825917 is 719528276.

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., 662496121 + 10329796 = 25739^2 + 3214^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-672825917 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (672825977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336412958 + 336412959.

It is an arithmetic number, because the mean of its divisors is an integer number (336412959).

Almost surely, 2^672825917 is an apocalyptic number.

It is an amenable number.

672825917 is a deficient number, since it is larger than the sum of its proper divisors (1).

672825917 is an equidigital number, since it uses as much as digits as its factorization.

672825917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 423360, while the sum is 47.

The square root of 672825917 is about 25938.8881218914. Note that the first 3 decimals coincide. The cubic root of 672825917 is about 876.2625222688.

It can be divided in two parts, 6728259 and 17, that added together give a palindrome (6728276).

The spelling of 672825917 in words is "six hundred seventy-two million, eight hundred twenty-five thousand, nine hundred seventeen".