42308647 has 4 divisors (see below), whose sum is σ = 42378280. Its totient is φ = 42239016.

The previous prime is 42308641. The next prime is 42308657. The reversal of 42308647 is 74680324.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42308647 - 2³ = 42308639 is a prime.

It is a super-2 number, since 2×42308647² = 3580043221941218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42308641) 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 in 3 ways as a sum of consecutive naturals, for example, 33897 + ... + 35122.

It is an arithmetic number, because the mean of its divisors is an integer number (10594570).

Almost surely, 2^42308647 is an apocalyptic number.

42308647 is a deficient number, since it is larger than the sum of its proper divisors (69633).

42308647 is an equidigital number, since it uses as much as digits as its factorization.

42308647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69632.

The product of its (nonzero) digits is 32256, while the sum is 34.

The square root of 42308647 is about 6504.5097432474. The cubic root of 42308647 is about 348.4520675081.

The spelling of 42308647 in words is "forty-two million, three hundred eight thousand, six hundred forty-seven".