71313973 has 4 divisors (see below), whose sum is σ = 75067360. Its totient is φ = 67560588.

The previous prime is 71313971. The next prime is 71313989. The reversal of 71313973 is 37931317.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 71313973 - 2¹ = 71313971 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 (71313971) 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, 1876665 + ... + 1876702.

It is an arithmetic number, because the mean of its divisors is an integer number (18766840).

Almost surely, 2^71313973 is an apocalyptic number.

It is an amenable number.

71313973 is a deficient number, since it is larger than the sum of its proper divisors (3753387).

71313973 is a wasteful number, since it uses less digits than its factorization.

71313973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3753386.

The product of its digits is 11907, while the sum is 34.

The square root of 71313973 is about 8444.7600913229. The cubic root of 71313973 is about 414.6912553384.

The spelling of 71313973 in words is "seventy-one million, three hundred thirteen thousand, nine hundred seventy-three".