399683089 has 8 divisors (see below), whose sum is σ = 432310760. Its totient is φ = 367324416.

The previous prime is 399683083. The next prime is 399683101. The reversal of 399683089 is 980386993.

It can be written as a sum of positive squares in 4 ways, for example, as 6969600 + 392713489 = 2640^2 + 19817^2 .

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 399683089 - 2⁵ = 399683057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399683083) 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, 64152 + ... + 70105.

It is an arithmetic number, because the mean of its divisors is an integer number (54038845).

Almost surely, 2^399683089 is an apocalyptic number.

It is an amenable number.

399683089 is a deficient number, since it is larger than the sum of its proper divisors (32627671).

399683089 is a wasteful number, since it uses less digits than its factorization.

399683089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134499.

The product of its (nonzero) digits is 2519424, while the sum is 55.

The square root of 399683089 is about 19992.0756551190. The cubic root of 399683089 is about 736.6116632993.

The spelling of 399683089 in words is "three hundred ninety-nine million, six hundred eighty-three thousand, eighty-nine".