71683505 has 8 divisors (see below), whose sum is σ = 88986600. Its totient is φ = 55369216.

The previous prime is 71683487. The next prime is 71683519. The reversal of 71683505 is 50538617.

It can be written as a sum of positive squares in 4 ways, for example, as 17631601 + 54051904 = 4199^2 + 7352^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71683505 - 2¹⁶ = 71617969 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 247040 + ... + 247329.

It is an arithmetic number, because the mean of its divisors is an integer number (11123325).

Almost surely, 2^71683505 is an apocalyptic number.

It is an amenable number.

71683505 is a deficient number, since it is larger than the sum of its proper divisors (17303095).

71683505 is a wasteful number, since it uses less digits than its factorization.

71683505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494403.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 71683505 is about 8466.6111874823. The cubic root of 71683505 is about 415.4062987564.

The spelling of 71683505 in words is "seventy-one million, six hundred eighty-three thousand, five hundred five".