420328136879 has 4 divisors (see below), whose sum is σ = 480375013584. Its totient is φ = 360281260176.

The previous prime is 420328136849. The next prime is 420328136897. The reversal of 420328136879 is 978631823024.

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 420328136879 - 2²⁰ = 420327088303 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 420328136879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420328136849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30023438342 + ... + 30023438355.

It is an arithmetic number, because the mean of its divisors is an integer number (120093753396).

Almost surely, 2^420328136879 is an apocalyptic number.

420328136879 is a deficient number, since it is larger than the sum of its proper divisors (60046876705).

420328136879 is an equidigital number, since it uses as much as digits as its factorization.

420328136879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60046876704.

The product of its (nonzero) digits is 3483648, while the sum is 53.

The spelling of 420328136879 in words is "four hundred twenty billion, three hundred twenty-eight million, one hundred thirty-six thousand, eight hundred seventy-nine".