245965817 has 2 divisors, whose sum is σ = 245965818. Its totient is φ = 245965816.

The previous prime is 245965807. The next prime is 245965823. The reversal of 245965817 is 718569542.

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., 245266921 + 698896 = 15661^2 + 836^2 .

It is a cyclic number.

It is not a de Polignac number, because 245965817 - 2¹⁰ = 245964793 is a prime.

It is not a weakly prime, because it can be changed into another prime (245965807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122982908 + 122982909.

It is an arithmetic number, because the mean of its divisors is an integer number (122982909).

Almost surely, 2^245965817 is an apocalyptic number.

It is an amenable number.

245965817 is a deficient number, since it is larger than the sum of its proper divisors (1).

245965817 is an equidigital number, since it uses as much as digits as its factorization.

245965817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 604800, while the sum is 47.

The square root of 245965817 is about 15683.2973892610. The cubic root of 245965817 is about 626.5536319377.

The spelling of 245965817 in words is "two hundred forty-five million, nine hundred sixty-five thousand, eight hundred seventeen".