1389006649 has 8 divisors (see below), whose sum is σ = 1437341760. Its totient is φ = 1340700816.

The previous prime is 1389006637. The next prime is 1389006659. The reversal of 1389006649 is 9466009831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1389006649 - 2¹⁵ = 1388973881 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1389006599 and 1389006608.

It is not an unprimeable number, because it can be changed into a prime (1389006629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139222 + ... + 148864.

It is an arithmetic number, because the mean of its divisors is an integer number (179667720).

Almost surely, 2^1389006649 is an apocalyptic number.

It is an amenable number.

1389006649 is a deficient number, since it is larger than the sum of its proper divisors (48335111).

1389006649 is an equidigital number, since it uses as much as digits as its factorization.

1389006649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14639.

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 1389006649 is about 37269.3795091896. The cubic root of 1389006649 is about 1115.7531155786.

The spelling of 1389006649 in words is "one billion, three hundred eighty-nine million, six thousand, six hundred forty-nine".