445557799 has 2 divisors, whose sum is σ = 445557800. Its totient is φ = 445557798.

The previous prime is 445557797. The next prime is 445557841. The reversal of 445557799 is 997755544.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 445557799 - 2¹ = 445557797 is a prime.

Together with 445557797, it forms a pair of twin primes.

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445557797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222778899 + 222778900.

It is an arithmetic number, because the mean of its divisors is an integer number (222778900).

Almost surely, 2^445557799 is an apocalyptic number.

445557799 is a deficient number, since it is larger than the sum of its proper divisors (1).

445557799 is an equidigital number, since it uses as much as digits as its factorization.

445557799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7938000, while the sum is 55.

The square root of 445557799 is about 21108.2400734879. The cubic root of 445557799 is about 763.7795334140.

The spelling of 445557799 in words is "four hundred forty-five million, five hundred fifty-seven thousand, seven hundred ninety-nine".