399650399797 has 16 divisors (see below), whose sum is σ = 456138478080. Its totient is φ = 346605058800.

The previous prime is 399650399779. The next prime is 399650399851. The reversal of 399650399797 is 797993056993.

It is not a de Polignac number, because 399650399797 - 2¹¹ = 399650397749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399650399737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1988079 + ... + 2179852.

It is an arithmetic number, because the mean of its divisors is an integer number (28508654880).

Almost surely, 2^399650399797 is an apocalyptic number.

It is an amenable number.

399650399797 is a deficient number, since it is larger than the sum of its proper divisors (56488078283).

399650399797 is a wasteful number, since it uses less digits than its factorization.

399650399797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4168344.

The product of its (nonzero) digits is 781218270, while the sum is 76.

The spelling of 399650399797 in words is "three hundred ninety-nine billion, six hundred fifty million, three hundred ninety-nine thousand, seven hundred ninety-seven".