71293391 has 8 divisors (see below), whose sum is σ = 76941984. Its totient is φ = 65668320.

The previous prime is 71293381. The next prime is 71293421. The reversal of 71293391 is 19339217.

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 71293391 - 2¹⁴ = 71277007 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 (71293381) 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, 701 + ... + 11961.

It is an arithmetic number, because the mean of its divisors is an integer number (9617748).

Almost surely, 2^71293391 is an apocalyptic number.

71293391 is a deficient number, since it is larger than the sum of its proper divisors (5648593).

71293391 is a wasteful number, since it uses less digits than its factorization.

71293391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11761.

The product of its digits is 10206, while the sum is 35.

The square root of 71293391 is about 8443.5413778817. The cubic root of 71293391 is about 414.6513566748.

The spelling of 71293391 in words is "seventy-one million, two hundred ninety-three thousand, three hundred ninety-one".