13404999987 has 96 divisors (see below), whose sum is σ = 21653667840. Its totient is φ = 8294783616.

The previous prime is 13404999983. The next prime is 13404999997. The reversal of 13404999987 is 78999940431.

13404999987 is a `hidden beast` number, since 13 + 40 + 499 + 9 + 98 + 7 = 666.

It is not a de Polignac number, because 13404999987 - 2² = 13404999983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13404999983) 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 95 ways as a sum of consecutive naturals, for example, 80269378 + ... + 80269544.

It is an arithmetic number, because the mean of its divisors is an integer number (225559040).

Almost surely, 2^13404999987 is an apocalyptic number.

13404999987 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

13404999987 is a deficient number, since it is larger than the sum of its proper divisors (8248667853).

13404999987 is an equidigital number, since it uses as much as digits as its factorization.

13404999987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349 (or 314 counting only the distinct ones).

The product of its (nonzero) digits is 17635968, while the sum is 63.

The spelling of 13404999987 in words is "thirteen billion, four hundred four million, nine hundred ninety-nine thousand, nine hundred eighty-seven".