42019069 has 2 divisors, whose sum is σ = 42019070. Its totient is φ = 42019068.

The previous prime is 42019067. The next prime is 42019097. The reversal of 42019069 is 96091024.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22992025 + 19027044 = 4795^2 + 4362^2 .

It is a cyclic number.

It is not a de Polignac number, because 42019069 - 2¹ = 42019067 is a prime.

It is a super-2 number, since 2×42019069² = 3531204319253522, which contains 22 as substring.

Together with 42019067, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42019069.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42019063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21009534 + 21009535.

It is an arithmetic number, because the mean of its divisors is an integer number (21009535).

Almost surely, 2^42019069 is an apocalyptic number.

It is an amenable number.

42019069 is a deficient number, since it is larger than the sum of its proper divisors (1).

42019069 is an equidigital number, since it uses as much as digits as its factorization.

42019069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 42019069 is about 6482.2117367454. The cubic root of 42019069 is about 347.6552631577.

The spelling of 42019069 in words is "forty-two million, nineteen thousand, sixty-nine".