1389197534 has 16 divisors (see below), whose sum is σ = 2207541600. Its totient is φ = 653393664.

The previous prime is 1389197461. The next prime is 1389197543. The reversal of 1389197534 is 4357919831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61247 + ... + 80805.

It is an arithmetic number, because the mean of its divisors is an integer number (137971350).

Almost surely, 2^1389197534 is an apocalyptic number.

1389197534 is a deficient number, since it is larger than the sum of its proper divisors (818344066).

1389197534 is a wasteful number, since it uses less digits than its factorization.

1389197534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21667.

The product of its digits is 816480, while the sum is 50.

The square root of 1389197534 is about 37271.9403036654. The cubic root of 1389197534 is about 1115.8042242319.

The spelling of 1389197534 in words is "one billion, three hundred eighty-nine million, one hundred ninety-seven thousand, five hundred thirty-four".