421734456447 has 4 divisors (see below), whose sum is σ = 562312608600. Its totient is φ = 281156304296.

The previous prime is 421734456371. The next prime is 421734456457. The reversal of 421734456447 is 744654437124.

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 421734456447 - 2²⁰ = 421733407871 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 421734456447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421734456457) 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, 70289076072 + ... + 70289076077.

It is an arithmetic number, because the mean of its divisors is an integer number (140578152150).

Almost surely, 2^421734456447 is an apocalyptic number.

421734456447 is a deficient number, since it is larger than the sum of its proper divisors (140578152153).

421734456447 is a wasteful number, since it uses less digits than its factorization.

421734456447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140578152152.

The product of its digits is 9031680, while the sum is 51.

The spelling of 421734456447 in words is "four hundred twenty-one billion, seven hundred thirty-four million, four hundred fifty-six thousand, four hundred forty-seven".