42979877 has 6 divisors (see below), whose sum is σ = 43239462. Its totient is φ = 42721352.

The previous prime is 42979861. The next prime is 42979883. The reversal of 42979877 is 77897924.

42979877 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 42393121 + 586756 = 6511^2 + 766^2 .

It is not a de Polignac number, because 42979877 - 2⁴ = 42979861 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 (42979817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 112028 + ... + 112410.

It is an arithmetic number, because the mean of its divisors is an integer number (7206577).

Almost surely, 2^42979877 is an apocalyptic number.

It is an amenable number.

42979877 is a deficient number, since it is larger than the sum of its proper divisors (259585).

42979877 is an frugal number, since it uses more digits than its factorization.

42979877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059 (or 676 counting only the distinct ones).

The product of its digits is 1778112, while the sum is 53.

The square root of 42979877 is about 6555.9039803829. The cubic root of 42979877 is about 350.2851472175.

The spelling of 42979877 in words is "forty-two million, nine hundred seventy-nine thousand, eight hundred seventy-seven".