420407447 has 4 divisors (see below), whose sum is σ = 421162776. Its totient is φ = 419652120.

The previous prime is 420407417. The next prime is 420407459. The reversal of 420407447 is 744704024.

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 420407447 - 2¹⁰ = 420406423 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 (420407417) 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, 376829 + ... + 377942.

It is an arithmetic number, because the mean of its divisors is an integer number (105290694).

Almost surely, 2^420407447 is an apocalyptic number.

420407447 is a deficient number, since it is larger than the sum of its proper divisors (755329).

420407447 is an equidigital number, since it uses as much as digits as its factorization.

420407447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755328.

The product of its (nonzero) digits is 25088, while the sum is 32.

The square root of 420407447 is about 20503.8398111183. The cubic root of 420407447 is about 749.1293285958.

The spelling of 420407447 in words is "four hundred twenty million, four hundred seven thousand, four hundred forty-seven".