71618017 has 2 divisors, whose sum is σ = 71618018. Its totient is φ = 71618016.

The previous prime is 71618009. The next prime is 71618039. The reversal of 71618017 is 71081617.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69956496 + 1661521 = 8364^2 + 1289^2 .

It is a cyclic number.

It is not a de Polignac number, because 71618017 - 2³ = 71618009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71618017.

It is not a weakly prime, because it can be changed into another prime (71678017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35809008 + 35809009.

It is an arithmetic number, because the mean of its divisors is an integer number (35809009).

Almost surely, 2^71618017 is an apocalyptic number.

It is an amenable number.

71618017 is a deficient number, since it is larger than the sum of its proper divisors (1).

71618017 is an equidigital number, since it uses as much as digits as its factorization.

71618017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2352, while the sum is 31.

The square root of 71618017 is about 8462.7428768692. The cubic root of 71618017 is about 415.2797591097.

The spelling of 71618017 in words is "seventy-one million, six hundred eighteen thousand, seventeen".