42850019 has 2 divisors, whose sum is σ = 42850020. Its totient is φ = 42850018.

The previous prime is 42850009. The next prime is 42850021. The reversal of 42850019 is 91005824.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42850019 is a prime.

It is a super-2 number, since 2×42850019² = 3672248256600722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 42850021, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 42849973 and 42850000.

It is not a weakly prime, because it can be changed into another prime (42850009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21425009 + 21425010.

It is an arithmetic number, because the mean of its divisors is an integer number (21425010).

Almost surely, 2^42850019 is an apocalyptic number.

42850019 is a deficient number, since it is larger than the sum of its proper divisors (1).

42850019 is an equidigital number, since it uses as much as digits as its factorization.

42850019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 42850019 is about 6545.9925908910. The cubic root of 42850019 is about 349.9320112836.

The spelling of 42850019 in words is "forty-two million, eight hundred fifty thousand, nineteen".