71971678 has 16 divisors (see below), whose sum is σ = 112228560. Its totient is φ = 34574400.

The previous prime is 71971673. The next prime is 71971709. The reversal of 71971678 is 87617917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71971673) 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, 9298 + ... + 15178.

It is an arithmetic number, because the mean of its divisors is an integer number (7014285).

Almost surely, 2^71971678 is an apocalyptic number.

71971678 is a deficient number, since it is larger than the sum of its proper divisors (40256882).

71971678 is a wasteful number, since it uses less digits than its factorization.

71971678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6123.

The product of its digits is 148176, while the sum is 46.

The square root of 71971678 is about 8483.6123202325. The cubic root of 71971678 is about 415.9622091842.

The spelling of 71971678 in words is "seventy-one million, nine hundred seventy-one thousand, six hundred seventy-eight".