71689485 has 32 divisors (see below), whose sum is σ = 131420160. Its totient is φ = 32689728.

The previous prime is 71689483. The next prime is 71689517. The reversal of 71689485 is 58498617.

It is not a de Polignac number, because 71689485 - 2¹ = 71689483 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71689483) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64444 + ... + 65546.

It is an arithmetic number, because the mean of its divisors is an integer number (4106880).

Almost surely, 2^71689485 is an apocalyptic number.

It is an amenable number.

71689485 is a deficient number, since it is larger than the sum of its proper divisors (59730675).

71689485 is a wasteful number, since it uses less digits than its factorization.

71689485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1737.

The product of its digits is 483840, while the sum is 48.

The square root of 71689485 is about 8466.9643320378. The cubic root of 71689485 is about 415.4178498127.

It can be divided in two parts, 7168 and 9485, that added together give a triangular number (16653 = T₁₈₂).

The spelling of 71689485 in words is "seventy-one million, six hundred eighty-nine thousand, four hundred eighty-five".