79827771 has 8 divisors (see below), whose sum is σ = 106575424. Its totient is φ = 53149320.

The previous prime is 79827757. The next prime is 79827809. The reversal of 79827771 is 17772897.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 79827771 - 2⁶ = 79827707 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79827771.

It is not an unprimeable number, because it can be changed into a prime (79827701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14545 + ... + 19266.

It is an arithmetic number, because the mean of its divisors is an integer number (13321928).

Almost surely, 2^79827771 is an apocalyptic number.

79827771 is a deficient number, since it is larger than the sum of its proper divisors (26747653).

79827771 is a wasteful number, since it uses less digits than its factorization.

79827771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34601.

The product of its digits is 345744, while the sum is 48.

The square root of 79827771 is about 8934.6388287384. The cubic root of 79827771 is about 430.5775023991.

It can be divided in two parts, 7982 and 7771, that added together give a triangular number (15753 = T₁₇₇).

The spelling of 79827771 in words is "seventy-nine million, eight hundred twenty-seven thousand, seven hundred seventy-one".