447021613 has 4 divisors (see below), whose sum is σ = 473317020. Its totient is φ = 420726208.

The previous prime is 447021611. The next prime is 447021623. The reversal of 447021613 is 316120744.

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 218951209 + 228070404 = 14797^2 + 15102^2 .

It is a cyclic number.

It is not a de Polignac number, because 447021613 - 2¹ = 447021611 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (447021611) 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, 13147678 + ... + 13147711.

It is an arithmetic number, because the mean of its divisors is an integer number (118329255).

Almost surely, 2^447021613 is an apocalyptic number.

It is an amenable number.

447021613 is a deficient number, since it is larger than the sum of its proper divisors (26295407).

447021613 is a wasteful number, since it uses less digits than its factorization.

447021613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26295406.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 447021613 is about 21142.8856355986. The cubic root of 447021613 is about 764.6150471836.

The spelling of 447021613 in words is "four hundred forty-seven million, twenty-one thousand, six hundred thirteen".