123898572171 has 12 divisors (see below), whose sum is σ = 195234113880. Its totient is φ = 75090043680.

The previous prime is 123898572157. The next prime is 123898572173. The reversal of 123898572171 is 171275898321.

123898572171 is a `hidden beast` number, since 12 + 389 + 85 + 7 + 2 + 171 = 666.

It is not a de Polignac number, because 123898572171 - 2²¹ = 123896475019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123898572173) 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, 625750266 + ... + 625750463.

It is an arithmetic number, because the mean of its divisors is an integer number (16269509490).

Almost surely, 2^123898572171 is an apocalyptic number.

123898572171 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123898572171 is a deficient number, since it is larger than the sum of its proper divisors (71335541709).

123898572171 is a wasteful number, since it uses less digits than its factorization.

123898572171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1251500746 (or 1251500743 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 54.

The spelling of 123898572171 in words is "one hundred twenty-three billion, eight hundred ninety-eight million, five hundred seventy-two thousand, one hundred seventy-one".