399246282309 has 16 divisors (see below), whose sum is σ = 622523551232. Its totient is φ = 222835133808.

The previous prime is 399246282289. The next prime is 399246282329. The reversal of 399246282309 is 903282642993.

It is an interprime number because it is at equal distance from previous prime (399246282289) and next prime (399246282329).

It is not a de Polignac number, because 399246282309 - 2¹⁶ = 399246216773 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399246282329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221065699 + ... + 221067504.

It is an arithmetic number, because the mean of its divisors is an integer number (38907721952).

Almost surely, 2^399246282309 is an apocalyptic number.

It is an amenable number.

399246282309 is a deficient number, since it is larger than the sum of its proper divisors (223277268923).

399246282309 is a wasteful number, since it uses less digits than its factorization.

399246282309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442133256.

The product of its (nonzero) digits is 10077696, while the sum is 57.

The spelling of 399246282309 in words is "three hundred ninety-nine billion, two hundred forty-six million, two hundred eighty-two thousand, three hundred nine".