825673817 has 2 divisors, whose sum is σ = 825673818. Its totient is φ = 825673816.

The previous prime is 825673753. The next prime is 825673829. The reversal of 825673817 is 718376528.

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., 656179456 + 169494361 = 25616^2 + 13019^2 .

It is a cyclic number.

It is not a de Polignac number, because 825673817 - 2⁶ = 825673753 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (825673417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 412836908 + 412836909.

It is an arithmetic number, because the mean of its divisors is an integer number (412836909).

Almost surely, 2^825673817 is an apocalyptic number.

It is an amenable number.

825673817 is a deficient number, since it is larger than the sum of its proper divisors (1).

825673817 is an equidigital number, since it uses as much as digits as its factorization.

825673817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 47.

The square root of 825673817 is about 28734.5404870167. The cubic root of 825673817 is about 938.1439977419.

The spelling of 825673817 in words is "eight hundred twenty-five million, six hundred seventy-three thousand, eight hundred seventeen".