16324991 has 2 divisors, whose sum is σ = 16324992. Its totient is φ = 16324990.

The previous prime is 16324969. The next prime is 16325033. The reversal of 16324991 is 19942361.

It is a weak prime.

It is an emirp because it is prime and its reverse (19942361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16324991 - 2⁶ = 16324927 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16324921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8162495 + 8162496.

It is an arithmetic number, because the mean of its divisors is an integer number (8162496).

Almost surely, 2^16324991 is an apocalyptic number.

16324991 is a deficient number, since it is larger than the sum of its proper divisors (1).

16324991 is an equidigital number, since it uses as much as digits as its factorization.

16324991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 35.

The square root of 16324991 is about 4040.4196564218. The cubic root of 16324991 is about 253.6788830608.

The spelling of 16324991 in words is "sixteen million, three hundred twenty-four thousand, nine hundred ninety-one".