71690089 has 3 divisors (see below), whose sum is σ = 71698557. Its totient is φ = 71681622.

The previous prime is 71690083. The next prime is 71690111. The reversal of 71690089 is 98009617.

The square root of 71690089 is 8467.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 98009617 = 47 ⋅2085311.

It is not a de Polignac number, because 71690089 - 2¹¹ = 71688041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71690083) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4234 + ... + 12700.

It is an arithmetic number, because the mean of its divisors is an integer number (23899519).

Almost surely, 2^71690089 is an apocalyptic number.

71690089 is the 8467-th square number.

71690089 is the 4234-th centered octagonal number.

It is an amenable number.

71690089 is a deficient number, since it is larger than the sum of its proper divisors (8468).

71690089 is an frugal number, since it uses more digits than its factorization.

71690089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16934 (or 8467 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 40.

The cubic root of 71690089 is about 415.4190164723.

The spelling of 71690089 in words is "seventy-one million, six hundred ninety thousand, eighty-nine".