1389070877 has 4 divisors (see below), whose sum is σ = 1402824156. Its totient is φ = 1375317600.

The previous prime is 1389070849. The next prime is 1389070931. The reversal of 1389070877 is 7780709831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1184323396 + 204747481 = 34414^2 + 14309^2 .

It is a cyclic number.

It is not a de Polignac number, because 1389070877 - 2¹⁴ = 1389054493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389073877) 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, 6876488 + ... + 6876689.

It is an arithmetic number, because the mean of its divisors is an integer number (350706039).

Almost surely, 2^1389070877 is an apocalyptic number.

It is an amenable number.

1389070877 is a deficient number, since it is larger than the sum of its proper divisors (13753279).

1389070877 is a wasteful number, since it uses less digits than its factorization.

1389070877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13753278.

The product of its (nonzero) digits is 592704, while the sum is 50.

The square root of 1389070877 is about 37270.2411717445. The cubic root of 1389070877 is about 1115.7703128772.

The spelling of 1389070877 in words is "one billion, three hundred eighty-nine million, seventy thousand, eight hundred seventy-seven".