16301921 has 2 divisors, whose sum is σ = 16301922. Its totient is φ = 16301920.

The previous prime is 16301891. The next prime is 16301933. The reversal of 16301921 is 12910361.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9541921 + 6760000 = 3089^2 + 2600^2 .

It is a cyclic number.

It is not a de Polignac number, because 16301921 - 2¹⁰ = 16300897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16301321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8150960 + 8150961.

It is an arithmetic number, because the mean of its divisors is an integer number (8150961).

Almost surely, 2^16301921 is an apocalyptic number.

It is an amenable number.

16301921 is a deficient number, since it is larger than the sum of its proper divisors (1).

16301921 is an equidigital number, since it uses as much as digits as its factorization.

16301921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 16301921 is about 4037.5637456268. The cubic root of 16301921 is about 253.5593295329.

The spelling of 16301921 in words is "sixteen million, three hundred one thousand, nine hundred twenty-one".