71667023 has 4 divisors (see below), whose sum is σ = 71686608. Its totient is φ = 71647440.

The previous prime is 71667007. The next prime is 71667047. The reversal of 71667023 is 32076617.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32076617 = 19 ⋅1688243.

It is a cyclic number.

It is not a de Polignac number, because 71667023 - 2⁴ = 71667007 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 (71667073) 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 3 ways as a sum of consecutive naturals, for example, 2486 + ... + 12227.

It is an arithmetic number, because the mean of its divisors is an integer number (17921652).

Almost surely, 2^71667023 is an apocalyptic number.

71667023 is a deficient number, since it is larger than the sum of its proper divisors (19585).

71667023 is a wasteful number, since it uses less digits than its factorization.

71667023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19584.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 71667023 is about 8465.6377786910. The cubic root of 71667023 is about 415.3744585563.

The spelling of 71667023 in words is "seventy-one million, six hundred sixty-seven thousand, twenty-three".