445409999 has 2 divisors, whose sum is σ = 445410000. Its totient is φ = 445409998.

The previous prime is 445409981. The next prime is 445410061. The reversal of 445409999 is 999904544.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 445409999 - 2²⁸ = 176974543 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 445409999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445409969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222704999 + 222705000.

It is an arithmetic number, because the mean of its divisors is an integer number (222705000).

Almost surely, 2^445409999 is an apocalyptic number.

445409999 is a deficient number, since it is larger than the sum of its proper divisors (1).

445409999 is an equidigital number, since it uses as much as digits as its factorization.

445409999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2099520, while the sum is 53.

The square root of 445409999 is about 21104.7387806625. The cubic root of 445409999 is about 763.6950706725.

The spelling of 445409999 in words is "four hundred forty-five million, four hundred nine thousand, nine hundred ninety-nine".