71528979 has 8 divisors (see below), whose sum is σ = 100982160. Its totient is φ = 44880896.

The previous prime is 71528953. The next prime is 71529001. The reversal of 71528979 is 97982517.

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 71528979 - 2⁹ = 71528467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71528929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 701214 + ... + 701315.

It is an arithmetic number, because the mean of its divisors is an integer number (12622770).

Almost surely, 2^71528979 is an apocalyptic number.

71528979 is a deficient number, since it is larger than the sum of its proper divisors (29453181).

71528979 is a wasteful number, since it uses less digits than its factorization.

71528979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1402549.

The product of its digits is 317520, while the sum is 48.

The square root of 71528979 is about 8457.4806532442. The cubic root of 71528979 is about 415.1075910134.

The spelling of 71528979 in words is "seventy-one million, five hundred twenty-eight thousand, nine hundred seventy-nine".