71986975 has 6 divisors (see below), whose sum is σ = 89263880. Its totient is φ = 57589560.

The previous prime is 71986973. The next prime is 71987017. The reversal of 71986975 is 57968917.

It is a happy number.

It is not a de Polignac number, because 71986975 - 2¹ = 71986973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71986973) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1439715 + ... + 1439764.

Almost surely, 2^71986975 is an apocalyptic number.

71986975 is a deficient number, since it is larger than the sum of its proper divisors (17276905).

71986975 is a wasteful number, since it uses less digits than its factorization.

71986975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2879489 (or 2879484 counting only the distinct ones).

The product of its digits is 952560, while the sum is 52.

The square root of 71986975 is about 8484.5138340390. The cubic root of 71986975 is about 415.9916769014.

The spelling of 71986975 in words is "seventy-one million, nine hundred eighty-six thousand, nine hundred seventy-five".