71973313 has 4 divisors (see below), whose sum is σ = 72540160. Its totient is φ = 71406468.

The previous prime is 71973299. The next prime is 71973437. The reversal of 71973313 is 31337917.

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 71973313 - 2¹⁷ = 71842241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71973113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 283233 + ... + 283486.

It is an arithmetic number, because the mean of its divisors is an integer number (18135040).

Almost surely, 2^71973313 is an apocalyptic number.

It is an amenable number.

71973313 is a deficient number, since it is larger than the sum of its proper divisors (566847).

71973313 is a wasteful number, since it uses less digits than its factorization.

71973313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566846.

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

The square root of 71973313 is about 8483.7086819386. The cubic root of 71973313 is about 415.9653590022.

The spelling of 71973313 in words is "seventy-one million, nine hundred seventy-three thousand, three hundred thirteen".