42335989 has 2 divisors, whose sum is σ = 42335990.
Its totient is φ = 42335988.
The previous prime is 42335983. The next prime is 42336011. The reversal of 42335989 is 98953324.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 35497764 + 6838225 = 5958^2 + 2615^2
It is a cyclic number.
It is not a de Polignac number, because 42335989 - 25 = 42335957 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (42335983) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21167994 + 21167995.
It is an arithmetic number, because the mean of its divisors is an integer number (21167995).
Almost surely, 242335989 is an apocalyptic number.
It is an amenable number.
42335989 is a deficient number, since it is larger than the sum of its proper divisors (1).
42335989 is an equidigital number, since it uses as much as digits as its factorization.
42335989 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 233280, while the sum is 43.
The square root of 42335989 is about 6506.6111763344.
The cubic root of 42335989 is about 348.5271138283.
The spelling of 42335989 in words is "forty-two million, three hundred thirty-five thousand, nine hundred eighty-nine".