71723811 has 4 divisors (see below), whose sum is σ = 95631752. Its totient is φ = 47815872.

The previous prime is 71723809. The next prime is 71723819. The reversal of 71723811 is 11832717.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 71723811 - 2¹ = 71723809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71723819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11953966 + ... + 11953971.

It is an arithmetic number, because the mean of its divisors is an integer number (23907938).

Almost surely, 2^71723811 is an apocalyptic number.

71723811 is a deficient number, since it is larger than the sum of its proper divisors (23907941).

71723811 is a wasteful number, since it uses less digits than its factorization.

71723811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23907940.

The product of its digits is 2352, while the sum is 30.

The square root of 71723811 is about 8468.9911441682. The cubic root of 71723811 is about 415.4841419977.

The spelling of 71723811 in words is "seventy-one million, seven hundred twenty-three thousand, eight hundred eleven".