1336681399 has 4 divisors (see below), whose sum is σ = 1337719680. Its totient is φ = 1335643120.

The previous prime is 1336681393. The next prime is 1336681439. The reversal of 1336681399 is 9931866331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1336681399 - 2³ = 1336681391 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1336681391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 517207 + ... + 519784.

It is an arithmetic number, because the mean of its divisors is an integer number (334429920).

Almost surely, 2^1336681399 is an apocalyptic number.

1336681399 is a deficient number, since it is larger than the sum of its proper divisors (1038281).

1336681399 is a wasteful number, since it uses less digits than its factorization.

1336681399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038280.

The product of its digits is 629856, while the sum is 49.

The square root of 1336681399 is about 36560.6537003922. The cubic root of 1336681399 is about 1101.5629020372.

The spelling of 1336681399 in words is "one billion, three hundred thirty-six million, six hundred eighty-one thousand, three hundred ninety-nine".