245441813 has 2 divisors, whose sum is σ = 245441814. Its totient is φ = 245441812.

The previous prime is 245441803. The next prime is 245441821. The reversal of 245441813 is 318144542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124925329 + 120516484 = 11177^2 + 10978^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245441813 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 245441813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245441803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122720906 + 122720907.

It is an arithmetic number, because the mean of its divisors is an integer number (122720907).

Almost surely, 2^245441813 is an apocalyptic number.

It is an amenable number.

245441813 is a deficient number, since it is larger than the sum of its proper divisors (1).

245441813 is an equidigital number, since it uses as much as digits as its factorization.

245441813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15360, while the sum is 32.

The square root of 245441813 is about 15666.5826841721. The cubic root of 245441813 is about 626.1083803203.

The spelling of 245441813 in words is "two hundred forty-five million, four hundred forty-one thousand, eight hundred thirteen".