13751987 has 8 divisors (see below), whose sum is σ = 13994640. Its totient is φ = 13511680.

The previous prime is 13751977. The next prime is 13751989. The reversal of 13751987 is 78915731.

13751987 = T₉₈ + T₉₉ + ... + T₄₃₆.

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 13751987 - 2⁴ = 13751971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13751989) 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, 14339 + ... + 15267.

It is an arithmetic number, because the mean of its divisors is an integer number (1749330).

Almost surely, 2^13751987 is an apocalyptic number.

13751987 is a deficient number, since it is larger than the sum of its proper divisors (242653).

13751987 is a wasteful number, since it uses less digits than its factorization.

13751987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173.

The product of its digits is 52920, while the sum is 41.

The square root of 13751987 is about 3708.3671608944. The cubic root of 13751987 is about 239.5825323594.

The spelling of 13751987 in words is "thirteen million, seven hundred fifty-one thousand, nine hundred eighty-seven".