1389652539 has 32 divisors (see below), whose sum is σ = 2148021504. Its totient is φ = 789780480.

The previous prime is 1389652507. The next prime is 1389652603. The reversal of 1389652539 is 9352569831.

It is not a de Polignac number, because 1389652539 - 2⁵ = 1389652507 is a prime.

It is a super-2 number, since 2×1389652539² = 3862268358298293042, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 1389652491 and 1389652500.

It is not an unprimeable number, because it can be changed into a prime (1389653539) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 154387 + ... + 163139.

It is an arithmetic number, because the mean of its divisors is an integer number (67125672).

Almost surely, 2^1389652539 is an apocalyptic number.

1389652539 is a deficient number, since it is larger than the sum of its proper divisors (758368965).

1389652539 is a wasteful number, since it uses less digits than its factorization.

1389652539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9067.

The product of its digits is 1749600, while the sum is 51.

The square root of 1389652539 is about 37278.0436584325. The cubic root of 1389652539 is about 1115.9260310232.

The spelling of 1389652539 in words is "one billion, three hundred eighty-nine million, six hundred fifty-two thousand, five hundred thirty-nine".