42819479 has 4 divisors (see below), whose sum is σ = 42998880. Its totient is φ = 42640080.

The previous prime is 42819433. The next prime is 42819509. The reversal of 42819479 is 97491824.

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 42819479 - 2⁸ = 42819223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42819079) 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, 89342 + ... + 89819.

It is an arithmetic number, because the mean of its divisors is an integer number (10749720).

Almost surely, 2^42819479 is an apocalyptic number.

42819479 is a deficient number, since it is larger than the sum of its proper divisors (179401).

42819479 is a wasteful number, since it uses less digits than its factorization.

42819479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179400.

The product of its digits is 145152, while the sum is 44.

The square root of 42819479 is about 6543.6594501853. The cubic root of 42819479 is about 349.8488571894.

The spelling of 42819479 in words is "forty-two million, eight hundred nineteen thousand, four hundred seventy-nine".