420409879 has 8 divisors (see below), whose sum is σ = 435873920. Its totient is φ = 405064800.

The previous prime is 420409867. The next prime is 420409901. The reversal of 420409879 is 978904024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 420409879 - 2¹¹ = 420407831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420409079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22512 + ... + 36709.

It is an arithmetic number, because the mean of its divisors is an integer number (54484240).

Almost surely, 2^420409879 is an apocalyptic number.

420409879 is a deficient number, since it is larger than the sum of its proper divisors (15464041).

420409879 is a wasteful number, since it uses less digits than its factorization.

420409879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59481.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 420409879 is about 20503.8991169972. The cubic root of 420409879 is about 749.1307731302.

The spelling of 420409879 in words is "four hundred twenty million, four hundred nine thousand, eight hundred seventy-nine".