642079113 has 16 divisors (see below), whose sum is σ = 924591360. Its totient is φ = 393997824.

The previous prime is 642079049. The next prime is 642079129. The reversal of 642079113 is 311970246.

It is not a de Polignac number, because 642079113 - 2⁶ = 642079049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (642079013) 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 15 ways as a sum of consecutive naturals, for example, 9553 + ... + 37086.

It is an arithmetic number, because the mean of its divisors is an integer number (57786960).

Almost surely, 2^642079113 is an apocalyptic number.

It is an amenable number.

642079113 is a deficient number, since it is larger than the sum of its proper divisors (282512247).

642079113 is a wasteful number, since it uses less digits than its factorization.

642079113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47008.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 642079113 is about 25339.2800410746. The cubic root of 642079113 is about 862.7060575517.

The spelling of 642079113 in words is "six hundred forty-two million, seventy-nine thousand, one hundred thirteen".