420443403 has 8 divisors (see below), whose sum is σ = 561421968. Its totient is φ = 279880224.

The previous prime is 420443399. The next prime is 420443407. The reversal of 420443403 is 304344024.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (420443399) and next prime (420443407).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 420443403 - 2² = 420443399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420443407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101476 + ... + 105537.

It is an arithmetic number, because the mean of its divisors is an integer number (70177746).

Almost surely, 2^420443403 is an apocalyptic number.

420443403 is a deficient number, since it is larger than the sum of its proper divisors (140978565).

420443403 is a wasteful number, since it uses less digits than its factorization.

420443403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207693.

The product of its (nonzero) digits is 4608, while the sum is 24.

The square root of 420443403 is about 20504.7166037475. The cubic root of 420443403 is about 749.1506848035.

Adding to 420443403 its reverse (304344024), we get a palindrome (724787427).

The spelling of 420443403 in words is "four hundred twenty million, four hundred forty-three thousand, four hundred three".