71481893 has 4 divisors (see below), whose sum is σ = 81693600. Its totient is φ = 61270188.

The previous prime is 71481887. The next prime is 71481899. The reversal of 71481893 is 39818417.

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.

It is an interprime number because it is at equal distance from previous prime (71481887) and next prime (71481899).

It is not a de Polignac number, because 71481893 - 2⁸ = 71481637 is a prime.

It is a super-2 number, since 2×71481893² = 10219322053726898, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 71481893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71481899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5105843 + ... + 5105856.

It is an arithmetic number, because the mean of its divisors is an integer number (20423400).

Almost surely, 2^71481893 is an apocalyptic number.

It is an amenable number.

71481893 is a deficient number, since it is larger than the sum of its proper divisors (10211707).

71481893 is a wasteful number, since it uses less digits than its factorization.

71481893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10211706.

The product of its digits is 48384, while the sum is 41.

The square root of 71481893 is about 8454.6965054933. The cubic root of 71481893 is about 415.0164855308.

The spelling of 71481893 in words is "seventy-one million, four hundred eighty-one thousand, eight hundred ninety-three".