248139189 has 12 divisors (see below), whose sum is σ = 359364096. Its totient is φ = 164991912.

The previous prime is 248139187. The next prime is 248139217. The reversal of 248139189 is 981931842.

248139189 is a `hidden beast` number, since 2 + 481 + 3 + 91 + 89 = 666.

It is not a de Polignac number, because 248139189 - 2¹ = 248139187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (248139181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32547 + ... + 39440.

It is an arithmetic number, because the mean of its divisors is an integer number (29947008).

Almost surely, 2^248139189 is an apocalyptic number.

It is an amenable number.

248139189 is a deficient number, since it is larger than the sum of its proper divisors (111224907).

248139189 is a wasteful number, since it uses less digits than its factorization.

248139189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72376 (or 72373 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 248139189 is about 15752.4343832945. The cubic root of 248139189 is about 628.3936476440.

The spelling of 248139189 in words is "two hundred forty-eight million, one hundred thirty-nine thousand, one hundred eighty-nine".