34423021 has 4 divisors (see below), whose sum is σ = 34622172. Its totient is φ = 34223872.

The previous prime is 34423013. The next prime is 34423027. The reversal of 34423021 is 12032443.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12032443 = 787 ⋅15289.

It can be written as a sum of positive squares in 2 ways, for example, as 25867396 + 8555625 = 5086^2 + 2925^2 .

It is a cyclic number.

It is not a de Polignac number, because 34423021 - 2³ = 34423013 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 34423021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34423027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99316 + ... + 99661.

It is an arithmetic number, because the mean of its divisors is an integer number (8655543).

Almost surely, 2^34423021 is an apocalyptic number.

It is an amenable number.

34423021 is a deficient number, since it is larger than the sum of its proper divisors (199151).

34423021 is a wasteful number, since it uses less digits than its factorization.

34423021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199150.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 34423021 is about 5867.1135151793. The cubic root of 34423021 is about 325.2991990254.

Adding to 34423021 its reverse (12032443), we get a palindrome (46455464).

The spelling of 34423021 in words is "thirty-four million, four hundred twenty-three thousand, twenty-one".