423126166 has 4 divisors (see below), whose sum is σ = 634689252. Its totient is φ = 211563082.

The previous prime is 423126157. The next prime is 423126169. The reversal of 423126166 is 661621324.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423126169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105781540 + ... + 105781543.

It is an arithmetic number, because the mean of its divisors is an integer number (158672313).

Almost surely, 2^423126166 is an apocalyptic number.

423126166 is a deficient number, since it is larger than the sum of its proper divisors (211563086).

423126166 is a wasteful number, since it uses less digits than its factorization.

423126166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211563085.

The product of its digits is 10368, while the sum is 31.

The square root of 423126166 is about 20570.0307729473. The cubic root of 423126166 is about 750.7406999477.

The spelling of 423126166 in words is "four hundred twenty-three million, one hundred twenty-six thousand, one hundred sixty-six".