71538849 has 8 divisors (see below), whose sum is σ = 105983520. Its totient is φ = 47692548.

The previous prime is 71538847. The next prime is 71538899. The reversal of 71538849 is 94883517.

71538849 is a `hidden beast` number, since 71 + 538 + 8 + 49 = 666.

It is not a de Polignac number, because 71538849 - 2¹ = 71538847 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71538847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1324767 + ... + 1324820.

It is an arithmetic number, because the mean of its divisors is an integer number (13247940).

Almost surely, 2^71538849 is an apocalyptic number.

It is an amenable number.

71538849 is a deficient number, since it is larger than the sum of its proper divisors (34444671).

71538849 is a wasteful number, since it uses less digits than its factorization.

71538849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2649596 (or 2649590 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 71538849 is about 8458.0641402155. The cubic root of 71538849 is about 415.1266831518.

The spelling of 71538849 in words is "seventy-one million, five hundred thirty-eight thousand, eight hundred forty-nine".