13858987 has 4 divisors (see below), whose sum is σ = 14054256. Its totient is φ = 13663720.

The previous prime is 13858981. The next prime is 13858993. The reversal of 13858987 is 78985831.

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

It is an interprime number because it is at equal distance from previous prime (13858981) and next prime (13858993).

It is a cyclic number.

It is not a de Polignac number, because 13858987 - 2¹¹ = 13856939 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13858987.

It is not an unprimeable number, because it can be changed into a prime (13858981) 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, 97528 + ... + 97669.

It is an arithmetic number, because the mean of its divisors is an integer number (3513564).

Almost surely, 2^13858987 is an apocalyptic number.

13858987 is a deficient number, since it is larger than the sum of its proper divisors (195269).

13858987 is an equidigital number, since it uses as much as digits as its factorization.

13858987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195268.

The product of its digits is 483840, while the sum is 49.

The square root of 13858987 is about 3722.7660415342. The cubic root of 13858987 is about 240.2023004940.

The spelling of 13858987 in words is "thirteen million, eight hundred fifty-eight thousand, nine hundred eighty-seven".