79827121 has 16 divisors (see below), whose sum is σ = 92828160. Its totient is φ = 67841280.

The previous prime is 79827109. The next prime is 79827133. The reversal of 79827121 is 12172897.

It is an interprime number because it is at equal distance from previous prime (79827109) and next prime (79827133).

It is a cyclic number.

It is not a de Polignac number, because 79827121 - 2⁹ = 79826609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79827161) 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, 28000 + ... + 30718.

It is an arithmetic number, because the mean of its divisors is an integer number (5801760).

Almost surely, 2^79827121 is an apocalyptic number.

It is an amenable number.

79827121 is a deficient number, since it is larger than the sum of its proper divisors (13001039).

79827121 is a wasteful number, since it uses less digits than its factorization.

79827121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2904.

The product of its digits is 14112, while the sum is 37.

The square root of 79827121 is about 8934.6024533831. The cubic root of 79827121 is about 430.5763337325.

The spelling of 79827121 in words is "seventy-nine million, eight hundred twenty-seven thousand, one hundred twenty-one".