13072387 has 4 divisors (see below), whose sum is σ = 13376440. Its totient is φ = 12768336.

The previous prime is 13072373. The next prime is 13072391. The reversal of 13072387 is 78327031.

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 13072387 - 2¹¹ = 13070339 is a prime.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (13072327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151962 + ... + 152047.

It is an arithmetic number, because the mean of its divisors is an integer number (3344110).

Almost surely, 2^13072387 is an apocalyptic number.

13072387 is a deficient number, since it is larger than the sum of its proper divisors (304053).

13072387 is an equidigital number, since it uses as much as digits as its factorization.

13072387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304052.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 13072387 is about 3615.5756111579. The cubic root of 13072387 is about 235.5690870340.

The spelling of 13072387 in words is "thirteen million, seventy-two thousand, three hundred eighty-seven".