42567689 has 2 divisors, whose sum is σ = 42567690. Its totient is φ = 42567688.

The previous prime is 42567667. The next prime is 42567697. The reversal of 42567689 is 98676524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36481600 + 6086089 = 6040^2 + 2467^2 .

It is a cyclic number.

It is not a de Polignac number, because 42567689 - 2¹⁶ = 42502153 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42567659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21283844 + 21283845.

It is an arithmetic number, because the mean of its divisors is an integer number (21283845).

Almost surely, 2^42567689 is an apocalyptic number.

It is an amenable number.

42567689 is a deficient number, since it is larger than the sum of its proper divisors (1).

42567689 is an equidigital number, since it uses as much as digits as its factorization.

42567689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 47.

The square root of 42567689 is about 6524.3918490538. The cubic root of 42567689 is about 349.1617736992.

The spelling of 42567689 in words is "forty-two million, five hundred sixty-seven thousand, six hundred eighty-nine".