445631899 has 2 divisors, whose sum is σ = 445631900. Its totient is φ = 445631898.

The previous prime is 445631881. The next prime is 445631903. The reversal of 445631899 is 998136544.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 445631899 - 2⁵ = 445631867 is a prime.

It is not a weakly prime, because it can be changed into another prime (445638899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222815949 + 222815950.

It is an arithmetic number, because the mean of its divisors is an integer number (222815950).

Almost surely, 2^445631899 is an apocalyptic number.

445631899 is a deficient number, since it is larger than the sum of its proper divisors (1).

445631899 is an equidigital number, since it uses as much as digits as its factorization.

445631899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 49.

The square root of 445631899 is about 21109.9952392226. The cubic root of 445631899 is about 763.8218720484.

The spelling of 445631899 in words is "four hundred forty-five million, six hundred thirty-one thousand, eight hundred ninety-nine".