399350965 has 8 divisors (see below), whose sum is σ = 516084408. Its totient is φ = 294905280.

The previous prime is 399350929. The next prime is 399350977. The reversal of 399350965 is 569053993.

It can be written as a sum of positive squares in 4 ways, for example, as 5447556 + 393903409 = 2334^2 + 19847^2 .

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

It is not a de Polignac number, because 399350965 - 2¹³ = 399342773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3071866 + ... + 3071995.

It is an arithmetic number, because the mean of its divisors is an integer number (64510551).

Almost surely, 2^399350965 is an apocalyptic number.

It is an amenable number.

399350965 is a deficient number, since it is larger than the sum of its proper divisors (116733443).

399350965 is a wasteful number, since it uses less digits than its factorization.

399350965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6143879.

The product of its (nonzero) digits is 984150, while the sum is 49.

The square root of 399350965 is about 19983.7675376792. The cubic root of 399350965 is about 736.4075730967.

The spelling of 399350965 in words is "three hundred ninety-nine million, three hundred fifty thousand, nine hundred sixty-five".