445405139 has 2 divisors, whose sum is σ = 445405140. Its totient is φ = 445405138.

The previous prime is 445405133. The next prime is 445405159. The reversal of 445405139 is 931504544.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445405139 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 445405099 and 445405108.

It is not a weakly prime, because it can be changed into another prime (445405133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222702569 + 222702570.

It is an arithmetic number, because the mean of its divisors is an integer number (222702570).

Almost surely, 2^445405139 is an apocalyptic number.

445405139 is a deficient number, since it is larger than the sum of its proper divisors (1).

445405139 is an equidigital number, since it uses as much as digits as its factorization.

445405139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 445405139 is about 21104.6236403306. The cubic root of 445405139 is about 763.6922930283.

It can be divided in two parts, 445405 and 139, that added together give a palindrome (445544).

The spelling of 445405139 in words is "four hundred forty-five million, four hundred five thousand, one hundred thirty-nine".