1389806507 has 4 divisors (see below), whose sum is σ = 1389996816. Its totient is φ = 1389616200.

The previous prime is 1389806461. The next prime is 1389806519. The reversal of 1389806507 is 7056089831.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1389806507 - 2⁶ = 1389806443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1389806557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83744 + ... + 98957.

It is an arithmetic number, because the mean of its divisors is an integer number (347499204).

Almost surely, 2^1389806507 is an apocalyptic number.

1389806507 is a deficient number, since it is larger than the sum of its proper divisors (190309).

1389806507 is an equidigital number, since it uses as much as digits as its factorization.

1389806507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190308.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 1389806507 is about 37280.1087310646. The cubic root of 1389806507 is about 1115.9672428967.

The spelling of 1389806507 in words is "one billion, three hundred eighty-nine million, eight hundred six thousand, five hundred seven".