42375689 has 2 divisors, whose sum is σ = 42375690. Its totient is φ = 42375688.

The previous prime is 42375653. The next prime is 42375701. The reversal of 42375689 is 98657324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22278400 + 20097289 = 4720^2 + 4483^2 .

It is a cyclic number.

It is not a de Polignac number, because 42375689 - 2⁸ = 42375433 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (42375089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21187844 + 21187845.

It is an arithmetic number, because the mean of its divisors is an integer number (21187845).

Almost surely, 2^42375689 is an apocalyptic number.

It is an amenable number.

42375689 is a deficient number, since it is larger than the sum of its proper divisors (1).

42375689 is an equidigital number, since it uses as much as digits as its factorization.

42375689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 44.

The square root of 42375689 is about 6509.6612047018. The cubic root of 42375689 is about 348.6360219858.

The spelling of 42375689 in words is "forty-two million, three hundred seventy-five thousand, six hundred eighty-nine".