423062821 has 4 divisors (see below), whose sum is σ = 423224352. Its totient is φ = 422901292.

The previous prime is 423062803. The next prime is 423062837. The reversal of 423062821 is 128260324.

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 423062821 - 2⁷ = 423062693 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 423062821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423063821) 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, 76771 + ... + 82096.

It is an arithmetic number, because the mean of its divisors is an integer number (105806088).

Almost surely, 2^423062821 is an apocalyptic number.

It is an amenable number.

423062821 is a deficient number, since it is larger than the sum of its proper divisors (161531).

423062821 is a wasteful number, since it uses less digits than its factorization.

423062821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161530.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 423062821 is about 20568.4909752758. The cubic root of 423062821 is about 750.7032343351.

The spelling of 423062821 in words is "four hundred twenty-three million, sixty-two thousand, eight hundred twenty-one".