13722987 has 32 divisors (see below), whose sum is σ = 19998720. Its totient is φ = 8352000.

The previous prime is 13722983. The next prime is 13723009. The reversal of 13722987 is 78922731.

It is not a de Polignac number, because 13722987 - 2² = 13722983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13722983) 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 31 ways as a sum of consecutive naturals, for example, 224937 + ... + 224997.

It is an arithmetic number, because the mean of its divisors is an integer number (624960).

Almost surely, 2^13722987 is an apocalyptic number.

13722987 is a deficient number, since it is larger than the sum of its proper divisors (6275733).

13722987 is a wasteful number, since it uses less digits than its factorization.

13722987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195.

The product of its digits is 42336, while the sum is 39.

The square root of 13722987 is about 3704.4550206474. The cubic root of 13722987 is about 239.4140043971.

The spelling of 13722987 in words is "thirteen million, seven hundred twenty-two thousand, nine hundred eighty-seven".