71047549 has 2 divisors, whose sum is σ = 71047550. Its totient is φ = 71047548.

The previous prime is 71047531. The next prime is 71047579. The reversal of 71047549 is 94574017.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53027524 + 18020025 = 7282^2 + 4245^2 .

It is a cyclic number.

It is not a de Polignac number, because 71047549 - 2¹¹ = 71045501 is a prime.

It is equal to p_4175974 and since 71047549 and 4175974 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71047579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35523774 + 35523775.

It is an arithmetic number, because the mean of its divisors is an integer number (35523775).

Almost surely, 2^71047549 is an apocalyptic number.

It is an amenable number.

71047549 is a deficient number, since it is larger than the sum of its proper divisors (1).

71047549 is an equidigital number, since it uses as much as digits as its factorization.

71047549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 71047549 is about 8428.9708149928. The cubic root of 71047549 is about 414.1741917528.

The spelling of 71047549 in words is "seventy-one million, forty-seven thousand, five hundred forty-nine".