13820747 has 2 divisors, whose sum is σ = 13820748. Its totient is φ = 13820746.

The previous prime is 13820743. The next prime is 13820767. The reversal of 13820747 is 74702831.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13820747 - 2² = 13820743 is a prime.

It is not a weakly prime, because it can be changed into another prime (13820743) 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 as a sum of consecutive naturals, namely, 6910373 + 6910374.

It is an arithmetic number, because the mean of its divisors is an integer number (6910374).

Almost surely, 2^13820747 is an apocalyptic number.

13820747 is a deficient number, since it is larger than the sum of its proper divisors (1).

13820747 is an equidigital number, since it uses as much as digits as its factorization.

13820747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 13820747 is about 3717.6265277728. The cubic root of 13820747 is about 239.9811732917.

The spelling of 13820747 in words is "thirteen million, eight hundred twenty thousand, seven hundred forty-seven".