16764491 has 2 divisors, whose sum is σ = 16764492. Its totient is φ = 16764490.

The previous prime is 16764481. The next prime is 16764509. The reversal of 16764491 is 19446761.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (19446761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16764491 - 2¹⁴ = 16748107 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16764421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8382245 + 8382246.

It is an arithmetic number, because the mean of its divisors is an integer number (8382246).

Almost surely, 2^16764491 is an apocalyptic number.

16764491 is a deficient number, since it is larger than the sum of its proper divisors (1).

16764491 is an equidigital number, since it uses as much as digits as its factorization.

16764491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 38.

The square root of 16764491 is about 4094.4463606207. The cubic root of 16764491 is about 255.9352609328.

The spelling of 16764491 in words is "sixteen million, seven hundred sixty-four thousand, four hundred ninety-one".