423847894209 has 4 divisors (see below), whose sum is σ = 565130525616. Its totient is φ = 282565262804.

The previous prime is 423847894193. The next prime is 423847894231. The reversal of 423847894209 is 902498748324.

It is a happy number.

423847894209 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 423847894209 - 2⁴ = 423847894193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (423847894109) 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, 70641315699 + ... + 70641315704.

It is an arithmetic number, because the mean of its divisors is an integer number (141282631404).

Almost surely, 2^423847894209 is an apocalyptic number.

It is an amenable number.

423847894209 is a deficient number, since it is larger than the sum of its proper divisors (141282631407).

423847894209 is a wasteful number, since it uses less digits than its factorization.

423847894209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141282631406.

The product of its (nonzero) digits is 27869184, while the sum is 60.

The spelling of 423847894209 in words is "four hundred twenty-three billion, eight hundred forty-seven million, eight hundred ninety-four thousand, two hundred nine".