71311373 has 4 divisors (see below), whose sum is σ = 81498720. Its totient is φ = 61124028.

The previous prime is 71311349. The next prime is 71311381. The reversal of 71311373 is 37311317.

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: 37311317 = 1801 ⋅20717.

It is not a de Polignac number, because 71311373 - 2¹² = 71307277 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 (71311333) 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, 5093663 + ... + 5093676.

It is an arithmetic number, because the mean of its divisors is an integer number (20374680).

Almost surely, 2^71311373 is an apocalyptic number.

It is an amenable number.

71311373 is a deficient number, since it is larger than the sum of its proper divisors (10187347).

71311373 is a wasteful number, since it uses less digits than its factorization.

71311373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10187346.

The product of its digits is 1323, while the sum is 26.

The square root of 71311373 is about 8444.6061483056. The cubic root of 71311373 is about 414.6862156044.

The spelling of 71311373 in words is "seventy-one million, three hundred eleven thousand, three hundred seventy-three".