71137189 has 2 divisors, whose sum is σ = 71137190. Its totient is φ = 71137188.

The previous prime is 71137153. The next prime is 71137217. The reversal of 71137189 is 98173117.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48650625 + 22486564 = 6975^2 + 4742^2 .

It is a cyclic number.

It is not a de Polignac number, because 71137189 - 2¹³ = 71128997 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71137109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35568594 + 35568595.

It is an arithmetic number, because the mean of its divisors is an integer number (35568595).

Almost surely, 2^71137189 is an apocalyptic number.

It is an amenable number.

71137189 is a deficient number, since it is larger than the sum of its proper divisors (1).

71137189 is an equidigital number, since it uses as much as digits as its factorization.

71137189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10584, while the sum is 37.

The square root of 71137189 is about 8434.2865139856. The cubic root of 71137189 is about 414.3483050611.

The spelling of 71137189 in words is "seventy-one million, one hundred thirty-seven thousand, one hundred eighty-nine".