42639179 has 16 divisors (see below), whose sum is σ = 49735296. Its totient is φ = 36124800.

The previous prime is 42639169. The next prime is 42639239. The reversal of 42639179 is 97193624.

It is a cyclic number.

It is not a de Polignac number, because 42639179 - 2¹² = 42635083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42639109) 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, 18944 + ... + 21074.

It is an arithmetic number, because the mean of its divisors is an integer number (3108456).

Almost surely, 2^42639179 is an apocalyptic number.

42639179 is a deficient number, since it is larger than the sum of its proper divisors (7096117).

42639179 is a wasteful number, since it uses less digits than its factorization.

42639179 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2266.

The product of its digits is 81648, while the sum is 41.

The square root of 42639179 is about 6529.8682222538. The cubic root of 42639179 is about 349.3571301222.

The spelling of 42639179 in words is "forty-two million, six hundred thirty-nine thousand, one hundred seventy-nine".