421329911 has 2 divisors, whose sum is σ = 421329912. Its totient is φ = 421329910.

The previous prime is 421329907. The next prime is 421329919. The reversal of 421329911 is 119923124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421329911 - 2² = 421329907 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421329919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210664955 + 210664956.

It is an arithmetic number, because the mean of its divisors is an integer number (210664956).

Almost surely, 2^421329911 is an apocalyptic number.

421329911 is a deficient number, since it is larger than the sum of its proper divisors (1).

421329911 is an equidigital number, since it uses as much as digits as its factorization.

421329911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 32.

The square root of 421329911 is about 20526.3223934537. The cubic root of 421329911 is about 749.6768450775.

The spelling of 421329911 in words is "four hundred twenty-one million, three hundred twenty-nine thousand, nine hundred eleven".