71201817 has 6 divisors (see below), whose sum is σ = 102847082. Its totient is φ = 47467872.

The previous prime is 71201807. The next prime is 71201827. The reversal of 71201817 is 71810217.

It is an interprime number because it is at equal distance from previous prime (71201807) and next prime (71201827).

It can be written as a sum of positive squares in only one way, i.e., 71166096 + 35721 = 8436^2 + 189^2 .

It is not a de Polignac number, because 71201817 - 2⁸ = 71201561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71201807) 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 5 ways as a sum of consecutive naturals, for example, 3955648 + ... + 3955665.

Almost surely, 2^71201817 is an apocalyptic number.

It is an amenable number.

71201817 is a deficient number, since it is larger than the sum of its proper divisors (31645265).

71201817 is a wasteful number, since it uses less digits than its factorization.

71201817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7911319 (or 7911316 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 27.

The square root of 71201817 is about 8438.1169107805. The cubic root of 71201817 is about 414.4737452953.

Subtracting 71201817 from its reverse (71810217), we obtain a square (608400 = 780²).

The spelling of 71201817 in words is "seventy-one million, two hundred one thousand, eight hundred seventeen".