421470647839 has 4 divisors (see below), whose sum is σ = 431272290856. Its totient is φ = 411669004824.

The previous prime is 421470647821. The next prime is 421470647849. The reversal of 421470647839 is 938746074124.

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 421470647839 - 2¹³ = 421470639647 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421470647839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421470647849) 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, 4900821444 + ... + 4900821529.

It is an arithmetic number, because the mean of its divisors is an integer number (107818072714).

Almost surely, 2^421470647839 is an apocalyptic number.

421470647839 is a deficient number, since it is larger than the sum of its proper divisors (9801643017).

421470647839 is an equidigital number, since it uses as much as digits as its factorization.

421470647839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9801643016.

The product of its (nonzero) digits is 8128512, while the sum is 55.

The spelling of 421470647839 in words is "four hundred twenty-one billion, four hundred seventy million, six hundred forty-seven thousand, eight hundred thirty-nine".