389748609 has 12 divisors (see below), whose sum is σ = 563170452. Its totient is φ = 259740000.

The previous prime is 389748599. The next prime is 389748637. The reversal of 389748609 is 906847983.

It can be written as a sum of positive squares in 2 ways, for example, as 233998209 + 155750400 = 15297^2 + 12480^2 .

It is not a de Polignac number, because 389748609 - 2⁷ = 389748481 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (389748659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27459 + ... + 39159.

It is an arithmetic number, because the mean of its divisors is an integer number (46930871).

Almost surely, 2^389748609 is an apocalyptic number.

It is an amenable number.

389748609 is a deficient number, since it is larger than the sum of its proper divisors (173421843).

389748609 is a wasteful number, since it uses less digits than its factorization.

389748609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15408 (or 15405 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The square root of 389748609 is about 19742.0517930635. The cubic root of 389748609 is about 730.4573408660.

The spelling of 389748609 in words is "three hundred eighty-nine million, seven hundred forty-eight thousand, six hundred nine".