445730913 has 12 divisors (see below), whose sum is σ = 644194980. Its totient is φ = 296987136.

The previous prime is 445730903. The next prime is 445730933. The reversal of 445730913 is 319037544.

It can be written as a sum of positive squares in 2 ways, for example, as 409333824 + 36397089 = 20232^2 + 6033^2 .

It is not a de Polignac number, because 445730913 - 2⁵ = 445730881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (445730903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4273 + ... + 30161.

It is an arithmetic number, because the mean of its divisors is an integer number (53682915).

Almost surely, 2^445730913 is an apocalyptic number.

It is an amenable number.

445730913 is a deficient number, since it is larger than the sum of its proper divisors (198464067).

445730913 is a wasteful number, since it uses less digits than its factorization.

445730913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27808 (or 27805 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 445730913 is about 21112.3403013498. The cubic root of 445730913 is about 763.8784385094.

The spelling of 445730913 in words is "four hundred forty-five million, seven hundred thirty thousand, nine hundred thirteen".