79842727 has 4 divisors (see below), whose sum is σ = 84539376. Its totient is φ = 75146080.

The previous prime is 79842691. The next prime is 79842743. The reversal of 79842727 is 72724897.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72724897 = 7 ⋅10389271.

It is a cyclic number.

It is not a de Polignac number, because 79842727 - 2¹⁹ = 79318439 is a prime.

It is a super-2 number, since 2×79842727² = 12749722109593058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79842227) 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 3 ways as a sum of consecutive naturals, for example, 2348299 + ... + 2348332.

It is an arithmetic number, because the mean of its divisors is an integer number (21134844).

Almost surely, 2^79842727 is an apocalyptic number.

79842727 is a deficient number, since it is larger than the sum of its proper divisors (4696649).

79842727 is a wasteful number, since it uses less digits than its factorization.

79842727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4696648.

The product of its digits is 395136, while the sum is 46.

The square root of 79842727 is about 8935.4757567798. The cubic root of 79842727 is about 430.6043907652.

The spelling of 79842727 in words is "seventy-nine million, eight hundred forty-two thousand, seven hundred twenty-seven".