71329481 has 4 divisors (see below), whose sum is σ = 73630464. Its totient is φ = 69028500.

The previous prime is 71329471. The next prime is 71329483. The reversal of 71329481 is 18492317.

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: 18492317 = 83 ⋅222799.

It is a cyclic number.

It is not a de Polignac number, because 71329481 - 2²² = 67135177 is a prime.

It is a super-2 number, since 2×71329481² = 10175789719458722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71329483) 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, 1150445 + ... + 1150506.

It is an arithmetic number, because the mean of its divisors is an integer number (18407616).

Almost surely, 2^71329481 is an apocalyptic number.

It is an amenable number.

71329481 is a deficient number, since it is larger than the sum of its proper divisors (2300983).

71329481 is a wasteful number, since it uses less digits than its factorization.

71329481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2300982.

The product of its digits is 12096, while the sum is 35.

The square root of 71329481 is about 8445.6782439304. The cubic root of 71329481 is about 414.7213128695.

The spelling of 71329481 in words is "seventy-one million, three hundred twenty-nine thousand, four hundred eighty-one".