71289487 has 8 divisors (see below), whose sum is σ = 71926272. Its totient is φ = 70656000.

The previous prime is 71289479. The next prime is 71289503. The reversal of 71289487 is 78498217.

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 71289487 - 2³ = 71289479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71289437) 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, 61362 + ... + 62512.

It is an arithmetic number, because the mean of its divisors is an integer number (8990784).

Almost surely, 2^71289487 is an apocalyptic number.

71289487 is a deficient number, since it is larger than the sum of its proper divisors (636785).

71289487 is a wasteful number, since it uses less digits than its factorization.

71289487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1649.

The product of its digits is 225792, while the sum is 46.

The square root of 71289487 is about 8443.3101920988. The cubic root of 71289487 is about 414.6437878177.

The spelling of 71289487 in words is "seventy-one million, two hundred eighty-nine thousand, four hundred eighty-seven".