71384569 has 4 divisors (see below), whose sum is σ = 71440740. Its totient is φ = 71328400.

The previous prime is 71384519. The next prime is 71384591. The reversal of 71384569 is 96548317.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96548317 = 41 ⋅2354837.

It can be written as a sum of positive squares in 2 ways, for example, as 2295225 + 69089344 = 1515^2 + 8312^2 .

It is a cyclic number.

It is not a de Polignac number, because 71384569 - 2¹³ = 71376377 is a prime.

It is a super-2 number, since 2×71384569² = 10191513382631522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71384519) 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, 26134 + ... + 28735.

It is an arithmetic number, because the mean of its divisors is an integer number (17860185).

Almost surely, 2^71384569 is an apocalyptic number.

It is an amenable number.

71384569 is a deficient number, since it is larger than the sum of its proper divisors (56171).

71384569 is a wasteful number, since it uses less digits than its factorization.

71384569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56170.

The product of its digits is 181440, while the sum is 43.

The square root of 71384569 is about 8448.9389274630. The cubic root of 71384569 is about 414.8280489553.

The spelling of 71384569 in words is "seventy-one million, three hundred eighty-four thousand, five hundred sixty-nine".