445343939 has 2 divisors, whose sum is σ = 445343940. Its totient is φ = 445343938.

The previous prime is 445343933. The next prime is 445343947. The reversal of 445343939 is 939343544.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445343939 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 445343939.

It is not a weakly prime, because it can be changed into another prime (445343933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222671969 + 222671970.

It is an arithmetic number, because the mean of its divisors is an integer number (222671970).

Almost surely, 2^445343939 is an apocalyptic number.

445343939 is a deficient number, since it is larger than the sum of its proper divisors (1).

445343939 is an equidigital number, since it uses as much as digits as its factorization.

445343939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 699840, while the sum is 44.

The square root of 445343939 is about 21103.1736712751. The cubic root of 445343939 is about 763.6573135568.

The spelling of 445343939 in words is "four hundred forty-five million, three hundred forty-three thousand, nine hundred thirty-nine".