71343805 has 16 divisors (see below), whose sum is σ = 92620080. Its totient is φ = 52443648.

The previous prime is 71343787. The next prime is 71343809. The reversal of 71343805 is 50834317.

71343805 = T₁₄₄₉ + T₁₄₅₀ + ... + T₁₅₁₃.

It can be written as a sum of positive squares in 8 ways, for example, as 2752281 + 68591524 = 1659^2 + 8282^2 .

It is a cyclic number.

It is not a de Polignac number, because 71343805 - 2²⁵ = 37789373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71343809) 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 15 ways as a sum of consecutive naturals, for example, 12489 + ... + 17281.

It is an arithmetic number, because the mean of its divisors is an integer number (5788755).

Almost surely, 2^71343805 is an apocalyptic number.

It is an amenable number.

71343805 is a deficient number, since it is larger than the sum of its proper divisors (21276275).

71343805 is a wasteful number, since it uses less digits than its factorization.

71343805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5040.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 71343805 is about 8446.5262090400. The cubic root of 71343805 is about 414.7490717073.

The spelling of 71343805 in words is "seventy-one million, three hundred forty-three thousand, eight hundred five".