399039589 has 12 divisors (see below), whose sum is σ = 457516836. Its totient is φ = 346674432.

The previous prime is 399039583. The next prime is 399039601. The reversal of 399039589 is 985930993.

It can be written as a sum of positive squares in 6 ways, for example, as 31550689 + 367488900 = 5617^2 + 19170^2 .

It is not a de Polignac number, because 399039589 - 2⁹ = 399039077 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 (399039583) 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, 66574 + ... + 72319.

It is an arithmetic number, because the mean of its divisors is an integer number (38126403).

Almost surely, 2^399039589 is an apocalyptic number.

It is an amenable number.

399039589 is a deficient number, since it is larger than the sum of its proper divisors (58477247).

399039589 is a wasteful number, since it uses less digits than its factorization.

399039589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138936 (or 138923 counting only the distinct ones).

The product of its (nonzero) digits is 2361960, while the sum is 55.

The square root of 399039589 is about 19975.9752953391. The cubic root of 399039589 is about 736.2161297417.

The spelling of 399039589 in words is "three hundred ninety-nine million, thirty-nine thousand, five hundred eighty-nine".