421906079 has 16 divisors (see below), whose sum is σ = 497120256. Its totient is φ = 350503200.

The previous prime is 421906049. The next prime is 421906081. The reversal of 421906079 is 970609124.

It is a cyclic number.

It is not a de Polignac number, because 421906079 - 2¹² = 421901983 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 (421906019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67184 + ... + 73194.

It is an arithmetic number, because the mean of its divisors is an integer number (31070016).

Almost surely, 2^421906079 is an apocalyptic number.

421906079 is a deficient number, since it is larger than the sum of its proper divisors (75214177).

421906079 is a wasteful number, since it uses less digits than its factorization.

421906079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6326.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 421906079 is about 20540.3524555934. The cubic root of 421906079 is about 750.0184167329.

The spelling of 421906079 in words is "four hundred twenty-one million, nine hundred six thousand, seventy-nine".