71688351 has 32 divisors (see below), whose sum is σ = 112942080. Its totient is φ = 39591936.

The previous prime is 71688347. The next prime is 71688367. The reversal of 71688351 is 15388617.

It is not a de Polignac number, because 71688351 - 2² = 71688347 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71688341) 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 31 ways as a sum of consecutive naturals, for example, 199510 + ... + 199868.

It is an arithmetic number, because the mean of its divisors is an integer number (3529440).

Almost surely, 2^71688351 is an apocalyptic number.

71688351 is a deficient number, since it is larger than the sum of its proper divisors (41253729).

71688351 is a wasteful number, since it uses less digits than its factorization.

71688351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663.

The product of its digits is 40320, while the sum is 39.

The square root of 71688351 is about 8466.8973656234. The cubic root of 71688351 is about 415.4156594109.

The spelling of 71688351 in words is "seventy-one million, six hundred eighty-eight thousand, three hundred fifty-one".