42447667 has 4 divisors (see below), whose sum is σ = 42532560. Its totient is φ = 42362776.

The previous prime is 42447641. The next prime is 42447679. The reversal of 42447667 is 76674424.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42447667 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42447607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41692 + ... + 42697.

It is an arithmetic number, because the mean of its divisors is an integer number (10633140).

Almost surely, 2^42447667 is an apocalyptic number.

42447667 is a deficient number, since it is larger than the sum of its proper divisors (84893).

42447667 is an equidigital number, since it uses as much as digits as its factorization.

42447667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84892.

The product of its digits is 225792, while the sum is 40.

The square root of 42447667 is about 6515.1874109652. The cubic root of 42447667 is about 348.8333043549.

It can be divided in two parts, 4244 and 7667, that added together give a palindrome (11911).

The spelling of 42447667 in words is "forty-two million, four hundred forty-seven thousand, six hundred sixty-seven".