445323661 has 4 divisors (see below), whose sum is σ = 448055872. Its totient is φ = 442591452.

The previous prime is 445323643. The next prime is 445323679. The reversal of 445323661 is 166323544.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (445323643) and next prime (445323679).

It is a cyclic number.

It is not a de Polignac number, because 445323661 - 2¹³ = 445315469 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 (445323611) 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, 1365861 + ... + 1366186.

It is an arithmetic number, because the mean of its divisors is an integer number (112013968).

Almost surely, 2^445323661 is an apocalyptic number.

It is an amenable number.

445323661 is a deficient number, since it is larger than the sum of its proper divisors (2732211).

445323661 is a wasteful number, since it uses less digits than its factorization.

445323661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2732210.

The product of its digits is 51840, while the sum is 34.

The square root of 445323661 is about 21102.6932167437. The cubic root of 445323661 is about 763.6457227564.

The spelling of 445323661 in words is "four hundred forty-five million, three hundred twenty-three thousand, six hundred sixty-one".