1399654203939 has 6 divisors (see below), whose sum is σ = 2021722739036. Its totient is φ = 933102802620.

The previous prime is 1399654203887. The next prime is 1399654203967. The reversal of 1399654203939 is 9393024569931.

1399654203939 is a `hidden beast` number, since 1 + 3 + 99 + 65 + 420 + 39 + 39 = 666.

It is not a de Polignac number, because 1399654203939 - 2⁷ = 1399654203811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1399654203979) 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 5 ways as a sum of consecutive naturals, for example, 77758566877 + ... + 77758566894.

Almost surely, 2^{1399654203939} is an apocalyptic number.

1399654203939 is a deficient number, since it is larger than the sum of its proper divisors (622068535097).

1399654203939 is a wasteful number, since it uses less digits than its factorization.

1399654203939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155517133777 (or 155517133774 counting only the distinct ones).

The product of its (nonzero) digits is 42515280, while the sum is 63.

The spelling of 1399654203939 in words is "one trillion, three hundred ninety-nine billion, six hundred fifty-four million, two hundred three thousand, nine hundred thirty-nine".