42386789 has 2 divisors, whose sum is σ = 42386790. Its totient is φ = 42386788.

The previous prime is 42386783. The next prime is 42386791. The reversal of 42386789 is 98768324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26522500 + 15864289 = 5150^2 + 3983^2 .

It is a cyclic number.

It is not a de Polignac number, because 42386789 - 2¹² = 42382693 is a prime.

Together with 42386791, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42386783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21193394 + 21193395.

It is an arithmetic number, because the mean of its divisors is an integer number (21193395).

Almost surely, 2^42386789 is an apocalyptic number.

It is an amenable number.

42386789 is a deficient number, since it is larger than the sum of its proper divisors (1).

42386789 is an equidigital number, since it uses as much as digits as its factorization.

42386789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 47.

The square root of 42386789 is about 6510.5137278098. The cubic root of 42386789 is about 348.6664602086. Note that the first 3 decimals are identical.

The spelling of 42386789 in words is "forty-two million, three hundred eighty-six thousand, seven hundred eighty-nine".