71671823 has 2 divisors, whose sum is σ = 71671824. Its totient is φ = 71671822.

The previous prime is 71671807. The next prime is 71671871. The reversal of 71671823 is 32817617.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71671823 - 2⁴ = 71671807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71671883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35835911 + 35835912.

It is an arithmetic number, because the mean of its divisors is an integer number (35835912).

Almost surely, 2^71671823 is an apocalyptic number.

71671823 is a deficient number, since it is larger than the sum of its proper divisors (1).

71671823 is an equidigital number, since it uses as much as digits as its factorization.

71671823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 35.

The square root of 71671823 is about 8465.9212729626. The cubic root of 71671823 is about 415.3837317795.

The spelling of 71671823 in words is "seventy-one million, six hundred seventy-one thousand, eight hundred twenty-three".