71915005 has 4 divisors (see below), whose sum is σ = 86298012. Its totient is φ = 57532000.

The previous prime is 71915003. The next prime is 71915023. The reversal of 71915005 is 50051917.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31427236 + 40487769 = 5606^2 + 6363^2 .

It is not a de Polignac number, because 71915005 - 2¹ = 71915003 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 (71915003) 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, 7191496 + ... + 7191505.

It is an arithmetic number, because the mean of its divisors is an integer number (21574503).

Almost surely, 2^71915005 is an apocalyptic number.

It is an amenable number.

71915005 is a deficient number, since it is larger than the sum of its proper divisors (14383007).

71915005 is a wasteful number, since it uses less digits than its factorization.

71915005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14383006.

The product of its (nonzero) digits is 1575, while the sum is 28.

The square root of 71915005 is about 8480.2715168796. The cubic root of 71915005 is about 415.8529994818.

The spelling of 71915005 in words is "seventy-one million, nine hundred fifteen thousand, five".