420100879 has 4 divisors (see below), whose sum is σ = 458291880. Its totient is φ = 381909880.

The previous prime is 420100861. The next prime is 420100903. The reversal of 420100879 is 978001024.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 420100879 - 2¹⁵ = 420068111 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 420100879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420100829) 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, 19095484 + ... + 19095505.

It is an arithmetic number, because the mean of its divisors is an integer number (114572970).

Almost surely, 2^420100879 is an apocalyptic number.

420100879 is a deficient number, since it is larger than the sum of its proper divisors (38191001).

420100879 is a wasteful number, since it uses less digits than its factorization.

420100879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38191000.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 420100879 is about 20496.3625797359. The cubic root of 420100879 is about 748.9471918552.

The spelling of 420100879 in words is "four hundred twenty million, one hundred thousand, eight hundred seventy-nine".