71979523 has 8 divisors (see below), whose sum is σ = 89740800. Its totient is φ = 56087880.

The previous prime is 71979491. The next prime is 71979539. The reversal of 71979523 is 32597917.

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 71979523 - 2⁵ = 71979491 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 71979523.

It is not an unprimeable number, because it can be changed into a prime (71979553) 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, 467323 + ... + 467476.

It is an arithmetic number, because the mean of its divisors is an integer number (11217600).

Almost surely, 2^71979523 is an apocalyptic number.

71979523 is a deficient number, since it is larger than the sum of its proper divisors (17761277).

71979523 is a wasteful number, since it uses less digits than its factorization.

71979523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934817.

The product of its digits is 119070, while the sum is 43.

The square root of 71979523 is about 8484.0746696384. The cubic root of 71979523 is about 415.9773220965.

The spelling of 71979523 in words is "seventy-one million, nine hundred seventy-nine thousand, five hundred twenty-three".