71897291 has 8 divisors (see below), whose sum is σ = 72653568. Its totient is φ = 71145000.

The previous prime is 71897281. The next prime is 71897299. The reversal of 71897291 is 19279817.

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 71897291 - 2¹⁰ = 71896267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71897299) 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, 46196 + ... + 47726.

It is an arithmetic number, because the mean of its divisors is an integer number (9081696).

Almost surely, 2^71897291 is an apocalyptic number.

71897291 is a deficient number, since it is larger than the sum of its proper divisors (756277).

71897291 is a wasteful number, since it uses less digits than its factorization.

71897291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993.

The product of its digits is 63504, while the sum is 44.

The square root of 71897291 is about 8479.2270284502. The cubic root of 71897291 is about 415.8188525749.

The spelling of 71897291 in words is "seventy-one million, eight hundred ninety-seven thousand, two hundred ninety-one".