13404987 has 8 divisors (see below), whose sum is σ = 19859280. Its totient is φ = 8936640.

The previous prime is 13404983. The next prime is 13405001. The reversal of 13404987 is 78940431.

It is a happy number.

It is not a de Polignac number, because 13404987 - 2² = 13404983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13404983) 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 7 ways as a sum of consecutive naturals, for example, 248214 + ... + 248267.

It is an arithmetic number, because the mean of its divisors is an integer number (2482410).

Almost surely, 2^13404987 is an apocalyptic number.

13404987 is a deficient number, since it is larger than the sum of its proper divisors (6454293).

13404987 is an equidigital number, since it uses as much as digits as its factorization.

13404987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496490 (or 496484 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 13404987 is about 3661.2821524706. The cubic root of 13404987 is about 237.5502357262.

The spelling of 13404987 in words is "thirteen million, four hundred four thousand, nine hundred eighty-seven".