42723589 has 2 divisors, whose sum is σ = 42723590. Its totient is φ = 42723588.

The previous prime is 42723557. The next prime is 42723617. The reversal of 42723589 is 98532724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36180225 + 6543364 = 6015^2 + 2558^2 .

It is a cyclic number.

It is not a de Polignac number, because 42723589 - 2⁵ = 42723557 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42723529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21361794 + 21361795.

It is an arithmetic number, because the mean of its divisors is an integer number (21361795).

Almost surely, 2^42723589 is an apocalyptic number.

It is an amenable number.

42723589 is a deficient number, since it is larger than the sum of its proper divisors (1).

42723589 is an equidigital number, since it uses as much as digits as its factorization.

42723589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 40.

The square root of 42723589 is about 6536.3284036223. The cubic root of 42723589 is about 349.5875113359.

The spelling of 42723589 in words is "forty-two million, seven hundred twenty-three thousand, five hundred eighty-nine".