71438149 has 2 divisors, whose sum is σ = 71438150. Its totient is φ = 71438148.

The previous prime is 71438071. The next prime is 71438189. The reversal of 71438149 is 94183417.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53949025 + 17489124 = 7345^2 + 4182^2 .

It is a cyclic number.

It is not a de Polignac number, because 71438149 - 2⁷ = 71438021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71438189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35719074 + 35719075.

It is an arithmetic number, because the mean of its divisors is an integer number (35719075).

Almost surely, 2^71438149 is an apocalyptic number.

It is an amenable number.

71438149 is a deficient number, since it is larger than the sum of its proper divisors (1).

71438149 is an equidigital number, since it uses as much as digits as its factorization.

71438149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 37.

The square root of 71438149 is about 8452.1091450596. The cubic root of 71438149 is about 414.9318105411.

The spelling of 71438149 in words is "seventy-one million, four hundred thirty-eight thousand, one hundred forty-nine".