445653421 has 4 divisors (see below), whose sum is σ = 446203744. Its totient is φ = 445103100.

The previous prime is 445653413. The next prime is 445653443. The reversal of 445653421 is 124356544.

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 a cyclic number.

It is not a de Polignac number, because 445653421 - 2³ = 445653413 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 (445650421) 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, 273945 + ... + 275566.

It is an arithmetic number, because the mean of its divisors is an integer number (111550936).

Almost surely, 2^445653421 is an apocalyptic number.

It is an amenable number.

445653421 is a deficient number, since it is larger than the sum of its proper divisors (550323).

445653421 is an equidigital number, since it uses as much as digits as its factorization.

445653421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550322.

The product of its digits is 57600, while the sum is 34.

The square root of 445653421 is about 21110.5049915913. The cubic root of 445653421 is about 763.8341682281.

The spelling of 445653421 in words is "four hundred forty-five million, six hundred fifty-three thousand, four hundred twenty-one".