421792879 has 2 divisors, whose sum is σ = 421792880. Its totient is φ = 421792878.

The previous prime is 421792873. The next prime is 421792897. The reversal of 421792879 is 978297124.

Together with next prime (421792897) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421792879 - 2⁷ = 421792751 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421792873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210896439 + 210896440.

It is an arithmetic number, because the mean of its divisors is an integer number (210896440).

Almost surely, 2^421792879 is an apocalyptic number.

421792879 is a deficient number, since it is larger than the sum of its proper divisors (1).

421792879 is an equidigital number, since it uses as much as digits as its factorization.

421792879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 49.

The square root of 421792879 is about 20537.5967191880. The cubic root of 421792879 is about 749.9513325457.

It can be divided in two parts, 42 and 1792879, that added together give a square (1792921 = 1339²).

The spelling of 421792879 in words is "four hundred twenty-one million, seven hundred ninety-two thousand, eight hundred seventy-nine".