420402343 has 4 divisors (see below), whose sum is σ = 420775840. Its totient is φ = 420028848.

The previous prime is 420402329. The next prime is 420402347. The reversal of 420402343 is 343204024.

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 420402343 - 2⁹ = 420401831 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 (420402347) 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, 185055 + ... + 187312.

It is an arithmetic number, because the mean of its divisors is an integer number (105193960).

Almost surely, 2^420402343 is an apocalyptic number.

420402343 is a deficient number, since it is larger than the sum of its proper divisors (373497).

420402343 is a wasteful number, since it uses less digits than its factorization.

420402343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373496.

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 420402343 is about 20503.7153462488. The cubic root of 420402343 is about 749.1262969563.

Adding to 420402343 its reverse (343204024), we get a palindrome (763606367).

The spelling of 420402343 in words is "four hundred twenty million, four hundred two thousand, three hundred forty-three".