71271949 has 4 divisors (see below), whose sum is σ = 81453664. Its totient is φ = 61090236.

The previous prime is 71271947. The next prime is 71271961. The reversal of 71271949 is 94917217.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94917217 = 19 ⋅4995643.

It is a cyclic number.

It is not a de Polignac number, because 71271949 - 2¹ = 71271947 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 (71271943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5090847 + ... + 5090860.

It is an arithmetic number, because the mean of its divisors is an integer number (20363416).

Almost surely, 2^71271949 is an apocalyptic number.

It is an amenable number.

71271949 is a deficient number, since it is larger than the sum of its proper divisors (10181715).

71271949 is a wasteful number, since it uses less digits than its factorization.

71271949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10181714.

The product of its digits is 31752, while the sum is 40.

The square root of 71271949 is about 8442.2715545047. The cubic root of 71271949 is about 414.6097827142.

The spelling of 71271949 in words is "seventy-one million, two hundred seventy-one thousand, nine hundred forty-nine".