445717643 has 16 divisors (see below), whose sum is σ = 513300480. Its totient is φ = 379126656.

The previous prime is 445717639. The next prime is 445717663. The reversal of 445717643 is 346717544.

It is a cyclic number.

It is not a de Polignac number, because 445717643 - 2² = 445717639 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 445717643.

It is not an unprimeable number, because it can be changed into a prime (445717603) 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 in 15 ways as a sum of consecutive naturals, for example, 930278 + ... + 930756.

It is an arithmetic number, because the mean of its divisors is an integer number (32081280).

Almost surely, 2^445717643 is an apocalyptic number.

445717643 is a deficient number, since it is larger than the sum of its proper divisors (67582837).

445717643 is a wasteful number, since it uses less digits than its factorization.

445717643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1226.

The product of its digits is 282240, while the sum is 41.

The square root of 445717643 is about 21112.0260278354. The cubic root of 445717643 is about 763.8708578763.

Subtracting from 445717643 its reverse (346717544), we obtain a palindrome (99000099).

The spelling of 445717643 in words is "four hundred forty-five million, seven hundred seventeen thousand, six hundred forty-three".