420040343 has 4 divisors (see below), whose sum is σ = 420084720. Its totient is φ = 419995968.

The previous prime is 420040333. The next prime is 420040399. The reversal of 420040343 is 343040024.

It is a happy number.

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 420040343 - 2⁶ = 420040279 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 (420040303) 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, 1658 + ... + 29031.

It is an arithmetic number, because the mean of its divisors is an integer number (105021180).

Almost surely, 2^420040343 is an apocalyptic number.

420040343 is a deficient number, since it is larger than the sum of its proper divisors (44377).

420040343 is a wasteful number, since it uses less digits than its factorization.

420040343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44376.

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 420040343 is about 20494.8857767005. The cubic root of 420040343 is about 748.9112160160.

Adding to 420040343 its reverse (343040024), we get a palindrome (763080367).

The spelling of 420040343 in words is "four hundred twenty million, forty thousand, three hundred forty-three".