16351691 has 2 divisors, whose sum is σ = 16351692. Its totient is φ = 16351690.

The previous prime is 16351651. The next prime is 16351717. The reversal of 16351691 is 19615361.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16351691 - 2⁶ = 16351627 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16351651) 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, 8175845 + 8175846.

It is an arithmetic number, because the mean of its divisors is an integer number (8175846).

Almost surely, 2^16351691 is an apocalyptic number.

16351691 is a deficient number, since it is larger than the sum of its proper divisors (1).

16351691 is an equidigital number, since it uses as much as digits as its factorization.

16351691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4860, while the sum is 32.

The square root of 16351691 is about 4043.7224187622. The cubic root of 16351691 is about 253.8171074744.

The spelling of 16351691 in words is "sixteen million, three hundred fifty-one thousand, six hundred ninety-one".