421608079 has 4 divisors (see below), whose sum is σ = 422586720. Its totient is φ = 420629440.

The previous prime is 421608073. The next prime is 421608097. The reversal of 421608079 is 970806124.

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 421608079 - 2³ = 421608071 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 (421608071) 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, 488674 + ... + 489535.

It is an arithmetic number, because the mean of its divisors is an integer number (105646680).

Almost surely, 2^421608079 is an apocalyptic number.

421608079 is a deficient number, since it is larger than the sum of its proper divisors (978641).

421608079 is an equidigital number, since it uses as much as digits as its factorization.

421608079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978640.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 421608079 is about 20533.0971604383. The cubic root of 421608079 is about 749.8417912216.

The spelling of 421608079 in words is "four hundred twenty-one million, six hundred eight thousand, seventy-nine".