16123691 has 2 divisors, whose sum is σ = 16123692. Its totient is φ = 16123690.

The previous prime is 16123651. The next prime is 16123693. The reversal of 16123691 is 19632161.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16123691 is a prime.

It is a super-2 number, since 2×16123691² = 519946822926962, which contains 22 as substring.

Together with 16123693, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16123693) 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, 8061845 + 8061846.

It is an arithmetic number, because the mean of its divisors is an integer number (8061846).

Almost surely, 2^16123691 is an apocalyptic number.

16123691 is a deficient number, since it is larger than the sum of its proper divisors (1).

16123691 is an equidigital number, since it uses as much as digits as its factorization.

16123691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 29.

The square root of 16123691 is about 4015.4316081836. The cubic root of 16123691 is about 252.6318809154.

The spelling of 16123691 in words is "sixteen million, one hundred twenty-three thousand, six hundred ninety-one".