445204013 has 2 divisors, whose sum is σ = 445204014. Its totient is φ = 445204012.

The previous prime is 445203959. The next prime is 445204037. The reversal of 445204013 is 310402544.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 344362249 + 100841764 = 18557^2 + 10042^2 .

It is a cyclic number.

It is not a de Polignac number, because 445204013 - 2¹⁴ = 445187629 is a prime.

It is a super-2 number, since 2×445204013² = 396413226382608338, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 445204013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445204063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222602006 + 222602007.

It is an arithmetic number, because the mean of its divisors is an integer number (222602007).

Almost surely, 2^445204013 is an apocalyptic number.

It is an amenable number.

445204013 is a deficient number, since it is larger than the sum of its proper divisors (1).

445204013 is an equidigital number, since it uses as much as digits as its factorization.

445204013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 445204013 is about 21099.8581274851. The cubic root of 445204013 is about 763.5773254120.

Adding to 445204013 its reverse (310402544), we get a palindrome (755606557).

The spelling of 445204013 in words is "four hundred forty-five million, two hundred four thousand, thirteen".