16224709 has 2 divisors, whose sum is σ = 16224710. Its totient is φ = 16224708.

The previous prime is 16224701. The next prime is 16224713. The reversal of 16224709 is 90742261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13300609 + 2924100 = 3647^2 + 1710^2 .

It is an emirp because it is prime and its reverse (90742261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16224709 - 2³ = 16224701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16224701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8112354 + 8112355.

It is an arithmetic number, because the mean of its divisors is an integer number (8112355).

Almost surely, 2^16224709 is an apocalyptic number.

It is an amenable number.

16224709 is a deficient number, since it is larger than the sum of its proper divisors (1).

16224709 is an equidigital number, since it uses as much as digits as its factorization.

16224709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 16224709 is about 4027.9906901581. The cubic root of 16224709 is about 253.1583785481.

The spelling of 16224709 in words is "sixteen million, two hundred twenty-four thousand, seven hundred nine".