71231949 has 12 divisors (see below), whose sum is σ = 103257856. Its totient is φ = 47318472.

The previous prime is 71231929. The next prime is 71231959. The reversal of 71231949 is 94913217.

It is not a de Polignac number, because 71231949 - 2¹¹ = 71229901 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 (71231929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11437 + ... + 16530.

Almost surely, 2^71231949 is an apocalyptic number.

It is an amenable number.

71231949 is a deficient number, since it is larger than the sum of its proper divisors (32025907).

71231949 is a wasteful number, since it uses less digits than its factorization.

71231949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28256 (or 28253 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 71231949 is about 8439.9021913764. The cubic root of 71231949 is about 414.5322042977.

The spelling of 71231949 in words is "seventy-one million, two hundred thirty-one thousand, nine hundred forty-nine".