71673873 has 4 divisors (see below), whose sum is σ = 95565168. Its totient is φ = 47782580.

The previous prime is 71673869. The next prime is 71673883. The reversal of 71673873 is 37837617.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37837617 = 3 ⋅12612539.

It is a cyclic number.

It is not a de Polignac number, because 71673873 - 2² = 71673869 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71673883) 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, 11945643 + ... + 11945648.

It is an arithmetic number, because the mean of its divisors is an integer number (23891292).

Almost surely, 2^71673873 is an apocalyptic number.

It is an amenable number.

71673873 is a deficient number, since it is larger than the sum of its proper divisors (23891295).

71673873 is a wasteful number, since it uses less digits than its factorization.

71673873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23891294.

The product of its digits is 148176, while the sum is 42.

The square root of 71673873 is about 8466.0423457481. The cubic root of 71673873 is about 415.3876920923.

The spelling of 71673873 in words is "seventy-one million, six hundred seventy-three thousand, eight hundred seventy-three".