71731623 has 8 divisors (see below), whose sum is σ = 96536448. Its totient is φ = 47373944.

The previous prime is 71731579. The next prime is 71731661. The reversal of 71731623 is 32613717.

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 71731623 - 2⁶ = 71731559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71731223) 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, 111411 + ... + 112052.

It is an arithmetic number, because the mean of its divisors is an integer number (12067056).

Almost surely, 2^71731623 is an apocalyptic number.

71731623 is a deficient number, since it is larger than the sum of its proper divisors (24804825).

71731623 is a wasteful number, since it uses less digits than its factorization.

71731623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223573.

The product of its digits is 5292, while the sum is 30.

The square root of 71731623 is about 8469.4523435698. The cubic root of 71731623 is about 415.4992259902.

The spelling of 71731623 in words is "seventy-one million, seven hundred thirty-one thousand, six hundred twenty-three".