13213387 has 4 divisors (see below), whose sum is σ = 14414616. Its totient is φ = 12012160.

The previous prime is 13213363. The next prime is 13213391. The reversal of 13213387 is 78331231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78331231 = 11 ⋅7121021.

It is a cyclic number.

It is not a de Polignac number, because 13213387 - 2⁷ = 13213259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13213327) 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, 600598 + ... + 600619.

It is an arithmetic number, because the mean of its divisors is an integer number (3603654).

Almost surely, 2^13213387 is an apocalyptic number.

13213387 is a deficient number, since it is larger than the sum of its proper divisors (1201229).

13213387 is a wasteful number, since it uses less digits than its factorization.

13213387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201228.

The product of its digits is 3024, while the sum is 28.

The square root of 13213387 is about 3635.0222832880. The cubic root of 13213387 is about 236.4130168345.

The spelling of 13213387 in words is "thirteen million, two hundred thirteen thousand, three hundred eighty-seven".