16243919 has 2 divisors, whose sum is σ = 16243920. Its totient is φ = 16243918.

The previous prime is 16243897. The next prime is 16243921. The reversal of 16243919 is 91934261.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16243919 - 2⁸ = 16243663 is a prime.

It is a super-2 number, since 2×16243919² = 527729808957122, which contains 22 as substring.

Together with 16243921, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16243979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8121959 + 8121960.

It is an arithmetic number, because the mean of its divisors is an integer number (8121960).

Almost surely, 2^16243919 is an apocalyptic number.

16243919 is a deficient number, since it is larger than the sum of its proper divisors (1).

16243919 is an equidigital number, since it uses as much as digits as its factorization.

16243919 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 16243919 is about 4030.3745483516. The cubic root of 16243919 is about 253.2582520268.

The spelling of 16243919 in words is "sixteen million, two hundred forty-three thousand, nine hundred nineteen".