79067521 has 8 divisors (see below), whose sum is σ = 85506344. Its totient is φ = 72679680.

The previous prime is 79067519. The next prime is 79067563. The reversal of 79067521 is 12576097.

It can be written as a sum of positive squares in 4 ways, for example, as 16483600 + 62583921 = 4060^2 + 7911^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 79067521 - 2¹ = 79067519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79067591) 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 7 ways as a sum of consecutive naturals, for example, 9486 + ... + 15751.

It is an arithmetic number, because the mean of its divisors is an integer number (10688293).

Almost surely, 2^79067521 is an apocalyptic number.

It is an amenable number.

79067521 is a deficient number, since it is larger than the sum of its proper divisors (6438823).

79067521 is a wasteful number, since it uses less digits than its factorization.

79067521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25491.

The product of its (nonzero) digits is 26460, while the sum is 37.

The square root of 79067521 is about 8891.9919590607. The cubic root of 79067521 is about 429.2062533922.

The spelling of 79067521 in words is "seventy-nine million, sixty-seven thousand, five hundred twenty-one".