13081387 has 8 divisors (see below), whose sum is σ = 14656752. Its totient is φ = 11570400.

The previous prime is 13081379. The next prime is 13081423. The reversal of 13081387 is 78318031.

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 13081387 - 2³ = 13081379 is a prime.

It is a super-2 number, since 2×13081387² = 342245371687538, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13081787) 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, 15664 + ... + 16477.

It is an arithmetic number, because the mean of its divisors is an integer number (1832094).

Almost surely, 2^13081387 is an apocalyptic number.

13081387 is a deficient number, since it is larger than the sum of its proper divisors (1575365).

13081387 is a wasteful number, since it uses less digits than its factorization.

13081387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32189.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 13081387 is about 3616.8200121101. The cubic root of 13081387 is about 235.6231357047.

The spelling of 13081387 in words is "thirteen million, eighty-one thousand, three hundred eighty-seven".