42317779 has 4 divisors (see below), whose sum is σ = 48363184. Its totient is φ = 36272376.

The previous prime is 42317773. The next prime is 42317783. The reversal of 42317779 is 97771324.

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

It is not a de Polignac number, because 42317779 - 2³ = 42317771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42317771) 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, 3022692 + ... + 3022705.

It is an arithmetic number, because the mean of its divisors is an integer number (12090796).

Almost surely, 2^42317779 is an apocalyptic number.

42317779 is a deficient number, since it is larger than the sum of its proper divisors (6045405).

42317779 is an equidigital number, since it uses as much as digits as its factorization.

42317779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6045404.

The product of its digits is 74088, while the sum is 40.

The square root of 42317779 is about 6505.2116798764. The cubic root of 42317779 is about 348.4771359484.

The spelling of 42317779 in words is "forty-two million, three hundred seventeen thousand, seven hundred seventy-nine".