445138087 has 4 divisors (see below), whose sum is σ = 449459920. Its totient is φ = 440816256.

The previous prime is 445138073. The next prime is 445138117. The reversal of 445138087 is 780831544.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 445138087 - 2¹¹ = 445136039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445138037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2160762 + ... + 2160967.

It is an arithmetic number, because the mean of its divisors is an integer number (112364980).

Almost surely, 2^445138087 is an apocalyptic number.

445138087 is a deficient number, since it is larger than the sum of its proper divisors (4321833).

445138087 is a wasteful number, since it uses less digits than its factorization.

445138087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4321832.

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 445138087 is about 21098.2958316543. The cubic root of 445138087 is about 763.5396332661.

The spelling of 445138087 in words is "four hundred forty-five million, one hundred thirty-eight thousand, eighty-seven".