42947827 has 4 divisors (see below), whose sum is σ = 46251520. Its totient is φ = 39644136.

The previous prime is 42947819. The next prime is 42947833. The reversal of 42947827 is 72874924.

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 42947827 - 2³ = 42947819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42947837) 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, 1651827 + ... + 1651852.

It is an arithmetic number, because the mean of its divisors is an integer number (11562880).

Almost surely, 2^42947827 is an apocalyptic number.

42947827 is a deficient number, since it is larger than the sum of its proper divisors (3303693).

42947827 is a wasteful number, since it uses less digits than its factorization.

42947827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3303692.

The product of its digits is 225792, while the sum is 43.

The square root of 42947827 is about 6553.4591629154. The cubic root of 42947827 is about 350.1980566109.

It can be divided in two parts, 4294 and 7827, that added together give a palindrome (12121).

The spelling of 42947827 in words is "forty-two million, nine hundred forty-seven thousand, eight hundred twenty-seven".