399016293 has 16 divisors (see below), whose sum is σ = 575836800. Its totient is φ = 244309824.

The previous prime is 399016243. The next prime is 399016309. The reversal of 399016293 is 392610993.

It is a happy number.

It is not a de Polignac number, because 399016293 - 2¹³ = 399008101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399016243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17946 + ... + 33467.

It is an arithmetic number, because the mean of its divisors is an integer number (35989800).

Almost surely, 2^399016293 is an apocalyptic number.

It is an amenable number.

399016293 is a deficient number, since it is larger than the sum of its proper divisors (176820507).

399016293 is a wasteful number, since it uses less digits than its factorization.

399016293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51628.

The product of its (nonzero) digits is 78732, while the sum is 42.

The square root of 399016293 is about 19975.3921863877. The cubic root of 399016293 is about 736.2018026547.

The spelling of 399016293 in words is "three hundred ninety-nine million, sixteen thousand, two hundred ninety-three".