16690343 has 2 divisors, whose sum is σ = 16690344. Its totient is φ = 16690342.

The previous prime is 16690339. The next prime is 16690361. The reversal of 16690343 is 34309661.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16690343 - 2² = 16690339 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16690363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8345171 + 8345172.

It is an arithmetic number, because the mean of its divisors is an integer number (8345172).

Almost surely, 2^16690343 is an apocalyptic number.

16690343 is a deficient number, since it is larger than the sum of its proper divisors (1).

16690343 is an equidigital number, since it uses as much as digits as its factorization.

16690343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 16690343 is about 4085.3816223212. The cubic root of 16690343 is about 255.5573762175.

It can be divided in two parts, 166 and 90343, that added together give a palindrome (90509).

The spelling of 16690343 in words is "sixteen million, six hundred ninety thousand, three hundred forty-three".