42319799 has 2 divisors, whose sum is σ = 42319800. Its totient is φ = 42319798.

The previous prime is 42319789. The next prime is 42319819. The reversal of 42319799 is 99791324.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42319799 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42319709) 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 as a sum of consecutive naturals, namely, 21159899 + 21159900.

It is an arithmetic number, because the mean of its divisors is an integer number (21159900).

Almost surely, 2^42319799 is an apocalyptic number.

42319799 is a deficient number, since it is larger than the sum of its proper divisors (1).

42319799 is an equidigital number, since it uses as much as digits as its factorization.

42319799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 44.

The square root of 42319799 is about 6505.3669381519. The cubic root of 42319799 is about 348.4826806046.

The spelling of 42319799 in words is "forty-two million, three hundred nineteen thousand, seven hundred ninety-nine".