71723957 has 8 divisors (see below), whose sum is σ = 73773216. Its totient is φ = 69692112.

The previous prime is 71723933. The next prime is 71723963. The reversal of 71723957 is 75932717.

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 71723957 - 2¹² = 71719861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71723557) 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, 4238 + ... + 12704.

It is an arithmetic number, because the mean of its divisors is an integer number (9221652).

Almost surely, 2^71723957 is an apocalyptic number.

It is an amenable number.

71723957 is a deficient number, since it is larger than the sum of its proper divisors (2049259).

71723957 is a wasteful number, since it uses less digits than its factorization.

71723957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8707.

The product of its digits is 92610, while the sum is 41.

The square root of 71723957 is about 8468.9997638446. Note that the first 3 decimals coincide. The cubic root of 71723957 is about 415.4844239154.

The spelling of 71723957 in words is "seventy-one million, seven hundred twenty-three thousand, nine hundred fifty-seven".