423194939 has 2 divisors, whose sum is σ = 423194940. Its totient is φ = 423194938.

The previous prime is 423194929. The next prime is 423194953. The reversal of 423194939 is 939491324.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423194939 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 423194939.

It is not a weakly prime, because it can be changed into another prime (423194929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211597469 + 211597470.

It is an arithmetic number, because the mean of its divisors is an integer number (211597470).

Almost surely, 2^423194939 is an apocalyptic number.

423194939 is a deficient number, since it is larger than the sum of its proper divisors (1).

423194939 is an equidigital number, since it uses as much as digits as its factorization.

423194939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 44.

The square root of 423194939 is about 20571.7023845865. The cubic root of 423194939 is about 750.7813717357.

The spelling of 423194939 in words is "four hundred twenty-three million, one hundred ninety-four thousand, nine hundred thirty-nine".