445945639 has 2 divisors, whose sum is σ = 445945640. Its totient is φ = 445945638.

The previous prime is 445945583. The next prime is 445945651. The reversal of 445945639 is 936549544.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 445945639 - 2¹¹ = 445943591 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 445945592 and 445945601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445945679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222972819 + 222972820.

It is an arithmetic number, because the mean of its divisors is an integer number (222972820).

Almost surely, 2^445945639 is an apocalyptic number.

445945639 is a deficient number, since it is larger than the sum of its proper divisors (1).

445945639 is an equidigital number, since it uses as much as digits as its factorization.

445945639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2332800, while the sum is 49.

The square root of 445945639 is about 21117.4250087457. The cubic root of 445945639 is about 764.0010821828.

The spelling of 445945639 in words is "four hundred forty-five million, nine hundred forty-five thousand, six hundred thirty-nine".