42859613 has 2 divisors, whose sum is σ = 42859614. Its totient is φ = 42859612.

The previous prime is 42859591. The next prime is 42859627. The reversal of 42859613 is 31695824.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31956409 + 10903204 = 5653^2 + 3302^2 .

It is a cyclic number.

It is not a de Polignac number, because 42859613 - 2⁶ = 42859549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42859213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21429806 + 21429807.

It is an arithmetic number, because the mean of its divisors is an integer number (21429807).

Almost surely, 2^42859613 is an apocalyptic number.

It is an amenable number.

42859613 is a deficient number, since it is larger than the sum of its proper divisors (1).

42859613 is an equidigital number, since it uses as much as digits as its factorization.

42859613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 38.

The square root of 42859613 is about 6546.7253646384. The cubic root of 42859613 is about 349.9581256025.

The spelling of 42859613 in words is "forty-two million, eight hundred fifty-nine thousand, six hundred thirteen".