16339909 has 2 divisors, whose sum is σ = 16339910. Its totient is φ = 16339908.

The previous prime is 16339901. The next prime is 16339919. The reversal of 16339909 is 90993361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15880225 + 459684 = 3985^2 + 678^2 .

It is a cyclic number.

It is not a de Polignac number, because 16339909 - 2³ = 16339901 is a prime.

It is a super-2 number, since 2×16339909² = 533985252256562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16339901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8169954 + 8169955.

It is an arithmetic number, because the mean of its divisors is an integer number (8169955).

Almost surely, 2^16339909 is an apocalyptic number.

It is an amenable number.

16339909 is a deficient number, since it is larger than the sum of its proper divisors (1).

16339909 is an equidigital number, since it uses as much as digits as its factorization.

16339909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39366, while the sum is 40.

The square root of 16339909 is about 4042.2653302325. The cubic root of 16339909 is about 253.7561312795.

The spelling of 16339909 in words is "sixteen million, three hundred thirty-nine thousand, nine hundred nine".