42919871 has 2 divisors, whose sum is σ = 42919872. Its totient is φ = 42919870.

The previous prime is 42919843. The next prime is 42919873. The reversal of 42919871 is 17891924.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42919871 - 2¹⁰ = 42918847 is a prime.

Together with 42919873, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42919873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21459935 + 21459936.

It is an arithmetic number, because the mean of its divisors is an integer number (21459936).

Almost surely, 2^42919871 is an apocalyptic number.

42919871 is a deficient number, since it is larger than the sum of its proper divisors (1).

42919871 is an equidigital number, since it uses as much as digits as its factorization.

42919871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 41.

The square root of 42919871 is about 6551.3258963358. The cubic root of 42919871 is about 350.1220553899.

The spelling of 42919871 in words is "forty-two million, nine hundred nineteen thousand, eight hundred seventy-one".