245676817 has 2 divisors, whose sum is σ = 245676818. Its totient is φ = 245676816.

The previous prime is 245676811. The next prime is 245676853. The reversal of 245676817 is 718676542.

It is a happy number.

245676817 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209207296 + 36469521 = 14464^2 + 6039^2 .

It is a cyclic number.

It is not a de Polignac number, because 245676817 - 2⁷ = 245676689 is a prime.

It is a super-2 number, since 2×245676817² = 120714196822502978, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (245676811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122838408 + 122838409.

It is an arithmetic number, because the mean of its divisors is an integer number (122838409).

Almost surely, 2^245676817 is an apocalyptic number.

It is an amenable number.

245676817 is a deficient number, since it is larger than the sum of its proper divisors (1).

245676817 is an equidigital number, since it uses as much as digits as its factorization.

245676817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 46.

The square root of 245676817 is about 15674.0810575931. The cubic root of 245676817 is about 626.3081439448.

The spelling of 245676817 in words is "two hundred forty-five million, six hundred seventy-six thousand, eight hundred seventeen".