16381447 has 2 divisors, whose sum is σ = 16381448. Its totient is φ = 16381446.

The previous prime is 16381397. The next prime is 16381471. The reversal of 16381447 is 74418361.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16381447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16381247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8190723 + 8190724.

It is an arithmetic number, because the mean of its divisors is an integer number (8190724).

Almost surely, 2^16381447 is an apocalyptic number.

16381447 is a deficient number, since it is larger than the sum of its proper divisors (1).

16381447 is an equidigital number, since it uses as much as digits as its factorization.

16381447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 34.

The square root of 16381447 is about 4047.4000296487. The cubic root of 16381447 is about 253.9709754588.

The spelling of 16381447 in words is "sixteen million, three hundred eighty-one thousand, four hundred forty-seven".