16920601 has 4 divisors (see below), whose sum is σ = 17504100. Its totient is φ = 16337104.

The previous prime is 16920599. The next prime is 16920641. The reversal of 16920601 is 10602961.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7557001 + 9363600 = 2749^2 + 3060^2 .

It is a cyclic number.

It is not a de Polignac number, because 16920601 - 2¹ = 16920599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16920641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 291706 + ... + 291763.

It is an arithmetic number, because the mean of its divisors is an integer number (4376025).

Almost surely, 2^16920601 is an apocalyptic number.

It is an amenable number.

16920601 is a deficient number, since it is larger than the sum of its proper divisors (583499).

16920601 is an equidigital number, since it uses as much as digits as its factorization.

16920601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583498.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 16920601 is about 4113.4658136418. The cubic root of 16920601 is about 256.7272260168.

The spelling of 16920601 in words is "sixteen million, nine hundred twenty thousand, six hundred one".