389199609 has 6 divisors (see below), whose sum is σ = 562177226. Its totient is φ = 259466400.

The previous prime is 389199607. The next prime is 389199647. The reversal of 389199609 is 906991983.

It can be written as a sum of positive squares in only one way, i.e., 389193984 + 5625 = 19728^2 + 75^2 .

It is not a de Polignac number, because 389199609 - 2¹ = 389199607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389199607) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21622192 + ... + 21622209.

Almost surely, 2^389199609 is an apocalyptic number.

It is an amenable number.

389199609 is a deficient number, since it is larger than the sum of its proper divisors (172977617).

389199609 is a wasteful number, since it uses less digits than its factorization.

389199609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43244407 (or 43244404 counting only the distinct ones).

The product of its (nonzero) digits is 944784, while the sum is 54.

The square root of 389199609 is about 19728.1425633535. The cubic root of 389199609 is about 730.1142055636.

The spelling of 389199609 in words is "three hundred eighty-nine million, one hundred ninety-nine thousand, six hundred nine".