71189693 has 16 divisors (see below), whose sum is σ = 78479280. Its totient is φ = 64275456.

The previous prime is 71189689. The next prime is 71189707. The reversal of 71189693 is 39698117.

It can be written as a sum of positive squares in 8 ways, for example, as 36638809 + 34550884 = 6053^2 + 5878^2 .

It is a cyclic number.

It is not a de Polignac number, because 71189693 - 2² = 71189689 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71189633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96755 + ... + 97487.

It is an arithmetic number, because the mean of its divisors is an integer number (4904955).

Almost surely, 2^71189693 is an apocalyptic number.

It is an amenable number.

71189693 is a deficient number, since it is larger than the sum of its proper divisors (7289587).

71189693 is a wasteful number, since it uses less digits than its factorization.

71189693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976.

The product of its digits is 81648, while the sum is 44.

The square root of 71189693 is about 8437.3984734633. The cubic root of 71189693 is about 414.4502189063.

The spelling of 71189693 in words is "seventy-one million, one hundred eighty-nine thousand, six hundred ninety-three".