71147149 has 2 divisors, whose sum is σ = 71147150. Its totient is φ = 71147148.

The previous prime is 71147137. The next prime is 71147203. The reversal of 71147149 is 94174117.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53144100 + 18003049 = 7290^2 + 4243^2 .

It is a cyclic number.

It is not a de Polignac number, because 71147149 - 2⁹ = 71146637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71147749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35573574 + 35573575.

It is an arithmetic number, because the mean of its divisors is an integer number (35573575).

Almost surely, 2^71147149 is an apocalyptic number.

It is an amenable number.

71147149 is a deficient number, since it is larger than the sum of its proper divisors (1).

71147149 is an equidigital number, since it uses as much as digits as its factorization.

71147149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 34.

The square root of 71147149 is about 8434.8769404183. The cubic root of 71147149 is about 414.3676419536.

The spelling of 71147149 in words is "seventy-one million, one hundred forty-seven thousand, one hundred forty-nine".