427422821 has 4 divisors (see below), whose sum is σ = 488483232. Its totient is φ = 366362412.

The previous prime is 427422799. The next prime is 427422883. The reversal of 427422821 is 128224724.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 427422821 - 2²⁶ = 360313957 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 (427422221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30530195 + ... + 30530208.

It is an arithmetic number, because the mean of its divisors is an integer number (122120808).

Almost surely, 2^427422821 is an apocalyptic number.

It is an amenable number.

427422821 is a deficient number, since it is larger than the sum of its proper divisors (61060411).

427422821 is an equidigital number, since it uses as much as digits as its factorization.

427422821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61060410.

The product of its digits is 14336, while the sum is 32.

The square root of 427422821 is about 20674.2066595069. The cubic root of 427422821 is about 753.2732909351.

The spelling of 427422821 in words is "four hundred twenty-seven million, four hundred twenty-two thousand, eight hundred twenty-one".