71712449 has 2 divisors, whose sum is σ = 71712450. Its totient is φ = 71712448.

The previous prime is 71712383. The next prime is 71712481. The reversal of 71712449 is 94421717.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68178049 + 3534400 = 8257^2 + 1880^2 .

It is a cyclic number.

It is not a de Polignac number, because 71712449 - 2¹² = 71708353 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71712049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35856224 + 35856225.

It is an arithmetic number, because the mean of its divisors is an integer number (35856225).

Almost surely, 2^71712449 is an apocalyptic number.

It is an amenable number.

71712449 is a deficient number, since it is larger than the sum of its proper divisors (1).

71712449 is an equidigital number, since it uses as much as digits as its factorization.

71712449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 35.

The square root of 71712449 is about 8468.3203175128. The cubic root of 71712449 is about 415.4622014452.

The spelling of 71712449 in words is "seventy-one million, seven hundred twelve thousand, four hundred forty-nine".