42389089 has 2 divisors, whose sum is σ = 42389090. Its totient is φ = 42389088.

The previous prime is 42389077. The next prime is 42389093. The reversal of 42389089 is 98098324.

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., 30195025 + 12194064 = 5495^2 + 3492^2 .

It is a cyclic number.

It is not a de Polignac number, because 42389089 - 2¹¹ = 42387041 is a prime.

It is not a weakly prime, because it can be changed into another prime (42189089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21194544 + 21194545.

It is an arithmetic number, because the mean of its divisors is an integer number (21194545).

Almost surely, 2^42389089 is an apocalyptic number.

It is an amenable number.

42389089 is a deficient number, since it is larger than the sum of its proper divisors (1).

42389089 is an equidigital number, since it uses as much as digits as its factorization.

42389089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 42389089 is about 6510.6903627803. The cubic root of 42389089 is about 348.6727665632.

The spelling of 42389089 in words is "forty-two million, three hundred eighty-nine thousand, eighty-nine".