71510189 has 2 divisors, whose sum is σ = 71510190. Its totient is φ = 71510188.

The previous prime is 71510141. The next prime is 71510207. The reversal of 71510189 is 98101517.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68475625 + 3034564 = 8275^2 + 1742^2 .

It is an emirp because it is prime and its reverse (98101517) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71510189 - 2²⁰ = 70461613 is a prime.

It is a super-2 number, since 2×71510189² = 10227414261631442, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71510689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35755094 + 35755095.

It is an arithmetic number, because the mean of its divisors is an integer number (35755095).

Almost surely, 2^71510189 is an apocalyptic number.

It is an amenable number.

71510189 is a deficient number, since it is larger than the sum of its proper divisors (1).

71510189 is an equidigital number, since it uses as much as digits as its factorization.

71510189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 32.

The square root of 71510189 is about 8456.3697293815. The cubic root of 71510189 is about 415.0712395242.

The spelling of 71510189 in words is "seventy-one million, five hundred ten thousand, one hundred eighty-nine".