42849089 has 2 divisors, whose sum is σ = 42849090. Its totient is φ = 42849088.

The previous prime is 42849083. The next prime is 42849091. The reversal of 42849089 is 98094824.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40538689 + 2310400 = 6367^2 + 1520^2 .

It is a cyclic number.

It is not a de Polignac number, because 42849089 - 2¹² = 42844993 is a prime.

Together with 42849091, 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 (42849083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21424544 + 21424545.

It is an arithmetic number, because the mean of its divisors is an integer number (21424545).

Almost surely, 2^42849089 is an apocalyptic number.

It is an amenable number.

42849089 is a deficient number, since it is larger than the sum of its proper divisors (1).

42849089 is an equidigital number, since it uses as much as digits as its factorization.

42849089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 42849089 is about 6545.9215546781. The cubic root of 42849089 is about 349.9294796696.

The spelling of 42849089 in words is "forty-two million, eight hundred forty-nine thousand, eighty-nine".