445641313 has 4 divisors (see below), whose sum is σ = 479921428. Its totient is φ = 411361200.

The previous prime is 445641311. The next prime is 445641323. The reversal of 445641313 is 313146544.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 57866449 + 387774864 = 7607^2 + 19692^2 .

It is a cyclic number.

It is not a de Polignac number, because 445641313 - 2¹ = 445641311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445641311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17140038 + ... + 17140063.

It is an arithmetic number, because the mean of its divisors is an integer number (119980357).

Almost surely, 2^445641313 is an apocalyptic number.

It is an amenable number.

445641313 is a deficient number, since it is larger than the sum of its proper divisors (34280115).

445641313 is a wasteful number, since it uses less digits than its factorization.

445641313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34280114.

The product of its digits is 17280, while the sum is 31.

The square root of 445641313 is about 21110.2182129887. The cubic root of 445641313 is about 763.8272506045.

Adding to 445641313 its reverse (313146544), we get a palindrome (758787857).

The spelling of 445641313 in words is "four hundred forty-five million, six hundred forty-one thousand, three hundred thirteen".