71712049 has 2 divisors, whose sum is σ = 71712050. Its totient is φ = 71712048.

The previous prime is 71711951. The next prime is 71712077. The reversal of 71712049 is 94021717.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53802225 + 17909824 = 7335^2 + 4232^2 .

It is a cyclic number.

It is not a de Polignac number, because 71712049 - 2⁹ = 71711537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71712049.

It is not a weakly prime, because it can be changed into another prime (71712449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35856024 + 35856025.

It is an arithmetic number, because the mean of its divisors is an integer number (35856025).

Almost surely, 2^71712049 is an apocalyptic number.

It is an amenable number.

71712049 is a deficient number, since it is larger than the sum of its proper divisors (1).

71712049 is an equidigital number, since it uses as much as digits as its factorization.

71712049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 71712049 is about 8468.2967000454. The cubic root of 71712049 is about 415.4614289843.

The spelling of 71712049 in words is "seventy-one million, seven hundred twelve thousand, forty-nine".