3405020243 has 4 divisors (see below), whose sum is σ = 3405143160. Its totient is φ = 3404897328.

The previous prime is 3405020209. The next prime is 3405020273. The reversal of 3405020243 is 3420205043.

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 a de Polignac number, because none of the positive numbers 2^k-3405020243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3405020273) 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, 1796 + ... + 82542.

It is an arithmetic number, because the mean of its divisors is an integer number (851285790).

Almost surely, 2^3405020243 is an apocalyptic number.

3405020243 is a deficient number, since it is larger than the sum of its proper divisors (122917).

3405020243 is an equidigital number, since it uses as much as digits as its factorization.

3405020243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122916.

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 3405020243 is about 58352.5512981223. The cubic root of 3405020243 is about 1504.4343216841.

Adding to 3405020243 its reverse (3420205043), we get a palindrome (6825225286).

The spelling of 3405020243 in words is "three billion, four hundred five million, twenty thousand, two hundred forty-three".