13540399 has 8 divisors (see below), whose sum is σ = 14458752. Its totient is φ = 12649560.

The previous prime is 13540393. The next prime is 13540411. The reversal of 13540399 is 99304531.

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

It is a cyclic number.

It is not a de Polignac number, because 13540399 - 2³ = 13540391 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 (13540391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5857 + ... + 7834.

It is an arithmetic number, because the mean of its divisors is an integer number (1807344).

Almost surely, 2^13540399 is an apocalyptic number.

13540399 is a deficient number, since it is larger than the sum of its proper divisors (918353).

13540399 is a wasteful number, since it uses less digits than its factorization.

13540399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13757.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 13540399 is about 3679.7281149563. The cubic root of 13540399 is about 238.3474376165.

The spelling of 13540399 in words is "thirteen million, five hundred forty thousand, three hundred ninety-nine".