71789489 has 8 divisors (see below), whose sum is σ = 74706720. Its totient is φ = 68929056.

The previous prime is 71789461. The next prime is 71789503. The reversal of 71789489 is 98498717.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71789489 - 2²⁴ = 55012273 is a prime.

It is a super-2 number, since 2×71789489² = 10307461461762242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 71789489.

It is not an unprimeable number, because it can be changed into a prime (71789989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11612 + ... + 16685.

It is an arithmetic number, because the mean of its divisors is an integer number (9338340).

Almost surely, 2^71789489 is an apocalyptic number.

It is an amenable number.

71789489 is a deficient number, since it is larger than the sum of its proper divisors (2917231).

71789489 is a wasteful number, since it uses less digits than its factorization.

71789489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28399.

The product of its digits is 1016064, while the sum is 53.

The square root of 71789489 is about 8472.8678143826. The cubic root of 71789489 is about 415.6109238944.

The spelling of 71789489 in words is "seventy-one million, seven hundred eighty-nine thousand, four hundred eighty-nine".