71437189 has 2 divisors, whose sum is σ = 71437190. Its totient is φ = 71437188.

The previous prime is 71437151. The next prime is 71437193. The reversal of 71437189 is 98173417.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35796289 + 35640900 = 5983^2 + 5970^2 .

It is an emirp because it is prime and its reverse (98173417) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71437189 - 2¹⁷ = 71306117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71437489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35718594 + 35718595.

It is an arithmetic number, because the mean of its divisors is an integer number (35718595).

Almost surely, 2^71437189 is an apocalyptic number.

It is an amenable number.

71437189 is a deficient number, since it is larger than the sum of its proper divisors (1).

71437189 is an equidigital number, since it uses as much as digits as its factorization.

71437189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 40.

The square root of 71437189 is about 8452.0523543102. The cubic root of 71437189 is about 414.9299518875.

The spelling of 71437189 in words is "seventy-one million, four hundred thirty-seven thousand, one hundred eighty-nine".