423186393 has 12 divisors (see below), whose sum is σ = 656370960. Its totient is φ = 241820712.

The previous prime is 423186377. The next prime is 423186403. The reversal of 423186393 is 393681324.

It is not a de Polignac number, because 423186393 - 2⁴ = 423186377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (423186493) 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 11 ways as a sum of consecutive naturals, for example, 1439263 + ... + 1439556.

It is an arithmetic number, because the mean of its divisors is an integer number (54697580).

Almost surely, 2^423186393 is an apocalyptic number.

It is an amenable number.

423186393 is a deficient number, since it is larger than the sum of its proper divisors (233184567).

423186393 is a wasteful number, since it uses less digits than its factorization.

423186393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2878836 (or 2878829 counting only the distinct ones).

The product of its digits is 93312, while the sum is 39.

The square root of 423186393 is about 20571.4946710248. The cubic root of 423186393 is about 750.7763179411.

The spelling of 423186393 in words is "four hundred twenty-three million, one hundred eighty-six thousand, three hundred ninety-three".