445346639 has 2 divisors, whose sum is σ = 445346640. Its totient is φ = 445346638.

The previous prime is 445346609. The next prime is 445346663. The reversal of 445346639 is 936643544.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 445346639 - 2¹² = 445342543 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 445346639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445346609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222673319 + 222673320.

It is an arithmetic number, because the mean of its divisors is an integer number (222673320).

Almost surely, 2^445346639 is an apocalyptic number.

445346639 is a deficient number, since it is larger than the sum of its proper divisors (1).

445346639 is an equidigital number, since it uses as much as digits as its factorization.

445346639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 44.

The square root of 445346639 is about 21103.2376425988. The cubic root of 445346639 is about 763.6588568363.

The spelling of 445346639 in words is "four hundred forty-five million, three hundred forty-six thousand, six hundred thirty-nine".