42989071 has 2 divisors, whose sum is σ = 42989072. Its totient is φ = 42989070.

The previous prime is 42989059. The next prime is 42989099. The reversal of 42989071 is 17098924.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42989071 - 2⁹ = 42988559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42989041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21494535 + 21494536.

It is an arithmetic number, because the mean of its divisors is an integer number (21494536).

Almost surely, 2^42989071 is an apocalyptic number.

42989071 is a deficient number, since it is larger than the sum of its proper divisors (1).

42989071 is an equidigital number, since it uses as much as digits as its factorization.

42989071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 42989071 is about 6556.6051429074. The cubic root of 42989071 is about 350.3101224094.

The spelling of 42989071 in words is "forty-two million, nine hundred eighty-nine thousand, seventy-one".