71338765 has 4 divisors (see below), whose sum is σ = 85606524. Its totient is φ = 57071008.

The previous prime is 71338733. The next prime is 71338793. The reversal of 71338765 is 56783317.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56783317 = 1697 ⋅33461.

It can be written as a sum of positive squares in 2 ways, for example, as 51811204 + 19527561 = 7198^2 + 4419^2 .

It is a cyclic number.

It is not a de Polignac number, because 71338765 - 2⁵ = 71338733 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7133872 + ... + 7133881.

It is an arithmetic number, because the mean of its divisors is an integer number (21401631).

Almost surely, 2^71338765 is an apocalyptic number.

It is an amenable number.

71338765 is a deficient number, since it is larger than the sum of its proper divisors (14267759).

71338765 is a wasteful number, since it uses less digits than its factorization.

71338765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14267758.

The product of its digits is 105840, while the sum is 40.

The square root of 71338765 is about 8446.2278562681. The cubic root of 71338765 is about 414.7393049890.

The spelling of 71338765 in words is "seventy-one million, three hundred thirty-eight thousand, seven hundred sixty-five".