42677979 has 16 divisors (see below), whose sum is σ = 59710464. Its totient is φ = 27079200.

The previous prime is 42677941. The next prime is 42677981. The reversal of 42677979 is 97977624.

It is a happy number.

It is not a de Polignac number, because 42677979 - 2⁷ = 42677851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42677179) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1912 + ... + 9434.

It is an arithmetic number, because the mean of its divisors is an integer number (3731904).

Almost surely, 2^42677979 is an apocalyptic number.

42677979 is a deficient number, since it is larger than the sum of its proper divisors (17032485).

42677979 is a wasteful number, since it uses less digits than its factorization.

42677979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7618.

The product of its digits is 1333584, while the sum is 51.

The square root of 42677979 is about 6532.8385101730. The cubic root of 42677979 is about 349.4630651451.

It can be divided in two parts, 4267 and 7979, that added together give a triangular number (12246 = T₁₅₆).

The spelling of 42677979 in words is "forty-two million, six hundred seventy-seven thousand, nine hundred seventy-nine".