423129194 has 4 divisors (see below), whose sum is σ = 634693794. Its totient is φ = 211564596.

The previous prime is 423129193. The next prime is 423129251. The reversal of 423129194 is 491921324.

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

It can be written as a sum of positive squares in only one way, i.e., 370755025 + 52374169 = 19255^2 + 7237^2 .

It is not an unprimeable number, because it can be changed into a prime (423129191) 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, 105782297 + ... + 105782300.

Almost surely, 2^423129194 is an apocalyptic number.

423129194 is a deficient number, since it is larger than the sum of its proper divisors (211564600).

423129194 is a wasteful number, since it uses less digits than its factorization.

423129194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211564599.

The product of its digits is 15552, while the sum is 35.

The square root of 423129194 is about 20570.1043750390. The cubic root of 423129194 is about 750.7424907748.

The spelling of 423129194 in words is "four hundred twenty-three million, one hundred twenty-nine thousand, one hundred ninety-four".