445420397 has 4 divisors (see below), whose sum is σ = 446374656. Its totient is φ = 444466140.

The previous prime is 445420337. The next prime is 445420399. The reversal of 445420397 is 793024544.

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 445420397 - 2⁸ = 445420141 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 445420397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445420399) 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, 476429 + ... + 477362.

It is an arithmetic number, because the mean of its divisors is an integer number (111593664).

Almost surely, 2^445420397 is an apocalyptic number.

It is an amenable number.

445420397 is a deficient number, since it is larger than the sum of its proper divisors (954259).

445420397 is an equidigital number, since it uses as much as digits as its factorization.

445420397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954258.

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 445420397 is about 21104.9851220038. The cubic root of 445420397 is about 763.7010133917.

The spelling of 445420397 in words is "four hundred forty-five million, four hundred twenty thousand, three hundred ninety-seven".