42747589 has 2 divisors, whose sum is σ = 42747590. Its totient is φ = 42747588.

The previous prime is 42747563. The next prime is 42747613. The reversal of 42747589 is 98574724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36784225 + 5963364 = 6065^2 + 2442^2 .

It is a cyclic number.

It is not a de Polignac number, because 42747589 - 2⁵ = 42747557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42747989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21373794 + 21373795.

It is an arithmetic number, because the mean of its divisors is an integer number (21373795).

Almost surely, 2^42747589 is an apocalyptic number.

It is an amenable number.

42747589 is a deficient number, since it is larger than the sum of its proper divisors (1).

42747589 is an equidigital number, since it uses as much as digits as its factorization.

42747589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564480, while the sum is 46.

The square root of 42747589 is about 6538.1640389333. The cubic root of 42747589 is about 349.6529594089.

The spelling of 42747589 in words is "forty-two million, seven hundred forty-seven thousand, five hundred eighty-nine".