420448693 has 4 divisors (see below), whose sum is σ = 480512800. Its totient is φ = 360384588.

The previous prime is 420448687. The next prime is 420448703. The reversal of 420448693 is 396844024.

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 a de Polignac number, because none of the positive numbers 2^k-420448693 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 (420448603) 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, 30032043 + ... + 30032056.

It is an arithmetic number, because the mean of its divisors is an integer number (120128200).

Almost surely, 2^420448693 is an apocalyptic number.

It is an amenable number.

420448693 is a deficient number, since it is larger than the sum of its proper divisors (60064107).

420448693 is an equidigital number, since it uses as much as digits as its factorization.

420448693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60064106.

The product of its (nonzero) digits is 165888, while the sum is 40.

The square root of 420448693 is about 20504.8455980532. The cubic root of 420448693 is about 749.1538267171.

The spelling of 420448693 in words is "four hundred twenty million, four hundred forty-eight thousand, six hundred ninety-three".