71773313 has 4 divisors (see below), whose sum is σ = 71839488. Its totient is φ = 71707140.

The previous prime is 71773309. The next prime is 71773367. The reversal of 71773313 is 31337717.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31337717 = 167 ⋅187651.

It is a cyclic number.

It is not a de Polignac number, because 71773313 - 2² = 71773309 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71773313.

It is not an unprimeable number, because it can be changed into a prime (71770313) 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, 31433 + ... + 33638.

It is an arithmetic number, because the mean of its divisors is an integer number (17959872).

Almost surely, 2^71773313 is an apocalyptic number.

It is an amenable number.

71773313 is a deficient number, since it is larger than the sum of its proper divisors (66175).

71773313 is a wasteful number, since it uses less digits than its factorization.

71773313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66174.

The product of its digits is 9261, while the sum is 32.

The square root of 71773313 is about 8471.9131841633. The cubic root of 71773313 is about 415.5797056412.

The spelling of 71773313 in words is "seventy-one million, seven hundred seventy-three thousand, three hundred thirteen".