16249643 has 2 divisors, whose sum is σ = 16249644. Its totient is φ = 16249642.

The previous prime is 16249609. The next prime is 16249669. The reversal of 16249643 is 34694261.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16249643 is a prime.

It is not a weakly prime, because it can be changed into another prime (16249043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8124821 + 8124822.

It is an arithmetic number, because the mean of its divisors is an integer number (8124822).

Almost surely, 2^16249643 is an apocalyptic number.

16249643 is a deficient number, since it is larger than the sum of its proper divisors (1).

16249643 is an equidigital number, since it uses as much as digits as its factorization.

16249643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 35.

The square root of 16249643 is about 4031.0845935058. The cubic root of 16249643 is about 253.2879960804.

The spelling of 16249643 in words is "sixteen million, two hundred forty-nine thousand, six hundred forty-three".