13638451 has 2 divisors, whose sum is σ = 13638452. Its totient is φ = 13638450.

The previous prime is 13638421. The next prime is 13638463. The reversal of 13638451 is 15483631.

It is a strong prime.

It is an emirp because it is prime and its reverse (15483631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13638451 - 2¹³ = 13630259 is a prime.

It is not a weakly prime, because it can be changed into another prime (13638421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6819225 + 6819226.

It is an arithmetic number, because the mean of its divisors is an integer number (6819226).

Almost surely, 2^13638451 is an apocalyptic number.

13638451 is a deficient number, since it is larger than the sum of its proper divisors (1).

13638451 is an equidigital number, since it uses as much as digits as its factorization.

13638451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 31.

The square root of 13638451 is about 3693.0273489375. The cubic root of 13638451 is about 238.9213807457.

The spelling of 13638451 in words is "thirteen million, six hundred thirty-eight thousand, four hundred fifty-one".