42959689 has 2 divisors, whose sum is σ = 42959690. Its totient is φ = 42959688.

The previous prime is 42959669. The next prime is 42959711. The reversal of 42959689 is 98695924.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26010000 + 16949689 = 5100^2 + 4117^2 .

It is a cyclic number.

It is not a de Polignac number, because 42959689 - 2⁹ = 42959177 is a prime.

It is not a weakly prime, because it can be changed into another prime (42959669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21479844 + 21479845.

It is an arithmetic number, because the mean of its divisors is an integer number (21479845).

Almost surely, 2^42959689 is an apocalyptic number.

It is an amenable number.

42959689 is a deficient number, since it is larger than the sum of its proper divisors (1).

42959689 is an equidigital number, since it uses as much as digits as its factorization.

42959689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1399680, while the sum is 52.

The square root of 42959689 is about 6554.3641186617. The cubic root of 42959689 is about 350.2302946948.

The spelling of 42959689 in words is "forty-two million, nine hundred fifty-nine thousand, six hundred eighty-nine".