71149249 has 2 divisors, whose sum is σ = 71149250. Its totient is φ = 71149248.

The previous prime is 71149201. The next prime is 71149259. The reversal of 71149249 is 94294117.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71098624 + 50625 = 8432^2 + 225^2 .

It is a cyclic number.

It is not a de Polignac number, because 71149249 - 2¹⁷ = 71018177 is a prime.

It is not a weakly prime, because it can be changed into another prime (71149259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35574624 + 35574625.

It is an arithmetic number, because the mean of its divisors is an integer number (35574625).

Almost surely, 2^71149249 is an apocalyptic number.

It is an amenable number.

71149249 is a deficient number, since it is larger than the sum of its proper divisors (1).

71149249 is an equidigital number, since it uses as much as digits as its factorization.

71149249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 37.

The square root of 71149249 is about 8435.0014226436. The cubic root of 71149249 is about 414.3717187789.

The spelling of 71149249 in words is "seventy-one million, one hundred forty-nine thousand, two hundred forty-nine".