42019499 has 2 divisors, whose sum is σ = 42019500. Its totient is φ = 42019498.

The previous prime is 42019493. The next prime is 42019501. The reversal of 42019499 is 99491024.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42019499 is a prime.

It is a super-2 number, since 2×42019499² = 3531276592422002, which contains 22 as substring.

Together with 42019501, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42019493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21009749 + 21009750.

It is an arithmetic number, because the mean of its divisors is an integer number (21009750).

Almost surely, 2^42019499 is an apocalyptic number.

42019499 is a deficient number, since it is larger than the sum of its proper divisors (1).

42019499 is an equidigital number, since it uses as much as digits as its factorization.

42019499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 42019499 is about 6482.2449043522. The cubic root of 42019499 is about 347.6564490578.

The spelling of 42019499 in words is "forty-two million, nineteen thousand, four hundred ninety-nine".