420310403 has 4 divisors (see below), whose sum is σ = 420360000. Its totient is φ = 420260808.

The previous prime is 420310399. The next prime is 420310433. The reversal of 420310403 is 304013024.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 420310403 - 2² = 420310399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420310433) 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, 8528 + ... + 30221.

It is an arithmetic number, because the mean of its divisors is an integer number (105090000).

Almost surely, 2^420310403 is an apocalyptic number.

420310403 is a deficient number, since it is larger than the sum of its proper divisors (49597).

420310403 is a wasteful number, since it uses less digits than its factorization.

420310403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49596.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 420310403 is about 20501.4731909685. The cubic root of 420310403 is about 749.0716828512.

Adding to 420310403 its reverse (304013024), we get a palindrome (724323427).

The spelling of 420310403 in words is "four hundred twenty million, three hundred ten thousand, four hundred three".