423621427 has 4 divisors (see below), whose sum is σ = 423953920. Its totient is φ = 423288936.

The previous prime is 423621403. The next prime is 423621437. The reversal of 423621427 is 724126324.

It is a happy number.

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 423621427 - 2²³ = 415232819 is a prime.

It is a super-2 number, since 2×423621427² = 358910226827032658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423621437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164328 + ... + 166885.

It is an arithmetic number, because the mean of its divisors is an integer number (105988480).

Almost surely, 2^423621427 is an apocalyptic number.

423621427 is a deficient number, since it is larger than the sum of its proper divisors (332493).

423621427 is a wasteful number, since it uses less digits than its factorization.

423621427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332492.

The product of its digits is 16128, while the sum is 31.

The square root of 423621427 is about 20582.0656640678. The cubic root of 423621427 is about 751.0334949006.

The spelling of 423621427 in words is "four hundred twenty-three million, six hundred twenty-one thousand, four hundred twenty-seven".