71432979 has 4 divisors (see below), whose sum is σ = 95243976. Its totient is φ = 47621984.

The previous prime is 71432969. The next prime is 71432987. The reversal of 71432979 is 97923417.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71432979 - 2⁹ = 71432467 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71432979.

It is not an unprimeable number, because it can be changed into a prime (71432939) 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 3 ways as a sum of consecutive naturals, for example, 11905494 + ... + 11905499.

It is an arithmetic number, because the mean of its divisors is an integer number (23810994).

Almost surely, 2^71432979 is an apocalyptic number.

71432979 is a deficient number, since it is larger than the sum of its proper divisors (23810997).

71432979 is a wasteful number, since it uses less digits than its factorization.

71432979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23810996.

The product of its digits is 95256, while the sum is 42.

The square root of 71432979 is about 8451.8032987050. The cubic root of 71432979 is about 414.9218007203.

The spelling of 71432979 in words is "seventy-one million, four hundred thirty-two thousand, nine hundred seventy-nine".