1389547171 has 4 divisors (see below), whose sum is σ = 1390885600. Its totient is φ = 1388208744.

The previous prime is 1389547169. The next prime is 1389547217. The reversal of 1389547171 is 1717459831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1717459831 = 73 ⋅23526847.

It is a cyclic number.

It is not a de Polignac number, because 1389547171 - 2¹ = 1389547169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1389547111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 667656 + ... + 669733.

It is an arithmetic number, because the mean of its divisors is an integer number (347721400).

Almost surely, 2^1389547171 is an apocalyptic number.

1389547171 is a deficient number, since it is larger than the sum of its proper divisors (1338429).

1389547171 is a wasteful number, since it uses less digits than its factorization.

1389547171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338428.

The product of its digits is 211680, while the sum is 46.

The square root of 1389547171 is about 37276.6303600527. The cubic root of 1389547171 is about 1115.8978259233.

The spelling of 1389547171 in words is "one billion, three hundred eighty-nine million, five hundred forty-seven thousand, one hundred seventy-one".