71448681 has 4 divisors (see below), whose sum is σ = 95264912. Its totient is φ = 47632452.

The previous prime is 71448679. The next prime is 71448697. The reversal of 71448681 is 18684417.

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: 18684417 = 3 ⋅6228139.

It is not a de Polignac number, because 71448681 - 2¹ = 71448679 is a prime.

It is a super-2 number, since 2×71448681² = 10209828033279522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71448581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11908111 + ... + 11908116.

It is an arithmetic number, because the mean of its divisors is an integer number (23816228).

Almost surely, 2^71448681 is an apocalyptic number.

It is an amenable number.

71448681 is a deficient number, since it is larger than the sum of its proper divisors (23816231).

71448681 is a wasteful number, since it uses less digits than its factorization.

71448681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23816230.

The product of its digits is 43008, while the sum is 39.

The square root of 71448681 is about 8452.7321618516. The cubic root of 71448681 is about 414.9522004268.

The spelling of 71448681 in words is "seventy-one million, four hundred forty-eight thousand, six hundred eighty-one".