79479142 has 4 divisors (see below), whose sum is σ = 119218716. Its totient is φ = 39739570.

The previous prime is 79479139. The next prime is 79479143. The reversal of 79479142 is 24197497.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79479143) 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 as a sum of consecutive naturals, namely, 19869784 + ... + 19869787.

It is an arithmetic number, because the mean of its divisors is an integer number (29804679).

Almost surely, 2^79479142 is an apocalyptic number.

79479142 is a deficient number, since it is larger than the sum of its proper divisors (39739574).

79479142 is a wasteful number, since it uses less digits than its factorization.

79479142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39739573.

The product of its digits is 127008, while the sum is 43.

The square root of 79479142 is about 8915.1075147751. The cubic root of 79479142 is about 429.9497723917.

The spelling of 79479142 in words is "seventy-nine million, four hundred seventy-nine thousand, one hundred forty-two".