16880309 has 2 divisors, whose sum is σ = 16880310. Its totient is φ = 16880308.

The previous prime is 16880293. The next prime is 16880317. The reversal of 16880309 is 90308861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13468900 + 3411409 = 3670^2 + 1847^2 .

It is a cyclic number.

It is not a de Polignac number, because 16880309 - 2⁴ = 16880293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16840309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8440154 + 8440155.

It is an arithmetic number, because the mean of its divisors is an integer number (8440155).

Almost surely, 2^16880309 is an apocalyptic number.

It is an amenable number.

16880309 is a deficient number, since it is larger than the sum of its proper divisors (1).

16880309 is an equidigital number, since it uses as much as digits as its factorization.

16880309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 16880309 is about 4108.5653213744. The cubic root of 16880309 is about 256.5232877361.

The spelling of 16880309 in words is "sixteen million, eight hundred eighty thousand, three hundred nine".