13550387 has 4 divisors (see below), whose sum is σ = 13586520. Its totient is φ = 13514256.

The previous prime is 13550347. The next prime is 13550413. The reversal of 13550387 is 78305531.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13550387 is a prime.

It is a super-2 number, since 2×13550387² = 367225975699538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13550347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17498 + ... + 18255.

It is an arithmetic number, because the mean of its divisors is an integer number (3396630).

Almost surely, 2^13550387 is an apocalyptic number.

13550387 is a deficient number, since it is larger than the sum of its proper divisors (36133).

13550387 is an equidigital number, since it uses as much as digits as its factorization.

13550387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36132.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 13550387 is about 3681.0850302594. The cubic root of 13550387 is about 238.4060284330.

The spelling of 13550387 in words is "thirteen million, five hundred fifty thousand, three hundred eighty-seven".