71385669 has 12 divisors (see below), whose sum is σ = 109178316. Its totient is φ = 44790912.

The previous prime is 71385667. The next prime is 71385673. The reversal of 71385669 is 96658317.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 62204769 + 9180900 = 7887^2 + 3030^2 .

It is not a de Polignac number, because 71385669 - 2¹ = 71385667 is a prime.

It is a super-2 number, since 2×71385669² = 10191827477155122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71385667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 233134 + ... + 233439.

It is an arithmetic number, because the mean of its divisors is an integer number (9098193).

Almost surely, 2^71385669 is an apocalyptic number.

It is an amenable number.

71385669 is a deficient number, since it is larger than the sum of its proper divisors (37792647).

71385669 is a wasteful number, since it uses less digits than its factorization.

71385669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466596 (or 466593 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 71385669 is about 8449.0040241439. The cubic root of 71385669 is about 414.8301797076.

The spelling of 71385669 in words is "seventy-one million, three hundred eighty-five thousand, six hundred sixty-nine".