399435069 has 8 divisors (see below), whose sum is σ = 580996512. Its totient is φ = 242081840.

The previous prime is 399435059. The next prime is 399435131. The reversal of 399435069 is 960534993.

It is a happy number.

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

It is not a de Polignac number, because 399435069 - 2¹² = 399430973 is a prime.

It is a super-2 number, since 2×399435069² = 319096748694069522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399435019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6052014 + ... + 6052079.

It is an arithmetic number, because the mean of its divisors is an integer number (72624564).

Almost surely, 2^399435069 is an apocalyptic number.

It is an amenable number.

399435069 is a deficient number, since it is larger than the sum of its proper divisors (181561443).

399435069 is a wasteful number, since it uses less digits than its factorization.

399435069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12104107.

The product of its (nonzero) digits is 787320, while the sum is 48.

The square root of 399435069 is about 19985.8717348031. The cubic root of 399435069 is about 736.4592657018.

The spelling of 399435069 in words is "three hundred ninety-nine million, four hundred thirty-five thousand, sixty-nine".