16346921 has 2 divisors, whose sum is σ = 16346922. Its totient is φ = 16346920.

The previous prime is 16346909. The next prime is 16346959. The reversal of 16346921 is 12964361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16000000 + 346921 = 4000^2 + 589^2 .

It is a cyclic number.

It is not a de Polignac number, because 16346921 - 2¹⁸ = 16084777 is a prime.

It is not a weakly prime, because it can be changed into another prime (16336921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8173460 + 8173461.

It is an arithmetic number, because the mean of its divisors is an integer number (8173461).

Almost surely, 2^16346921 is an apocalyptic number.

It is an amenable number.

16346921 is a deficient number, since it is larger than the sum of its proper divisors (1).

16346921 is an equidigital number, since it uses as much as digits as its factorization.

16346921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 32.

The square root of 16346921 is about 4043.1325726471. The cubic root of 16346921 is about 253.7924244952.

It can be divided in two parts, 16 and 346921, that multiplied together give a square (5550736 = 2356²).

The spelling of 16346921 in words is "sixteen million, three hundred forty-six thousand, nine hundred twenty-one".