42787079 has 4 divisors (see below), whose sum is σ = 45303984. Its totient is φ = 40270176.

The previous prime is 42787039. The next prime is 42787091. The reversal of 42787079 is 97078724.

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 42787079 - 2¹² = 42782983 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 (42787009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1258427 + ... + 1258460.

It is an arithmetic number, because the mean of its divisors is an integer number (11325996).

Almost surely, 2^42787079 is an apocalyptic number.

42787079 is a deficient number, since it is larger than the sum of its proper divisors (2516905).

42787079 is a wasteful number, since it uses less digits than its factorization.

42787079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2516904.

The product of its (nonzero) digits is 197568, while the sum is 44.

The square root of 42787079 is about 6541.1833027366. The cubic root of 42787079 is about 349.7605954652.

The spelling of 42787079 in words is "forty-two million, seven hundred eighty-seven thousand, seventy-nine".