16698961 has 2 divisors, whose sum is σ = 16698962. Its totient is φ = 16698960.

The previous prime is 16698937. The next prime is 16698971. The reversal of 16698961 is 16989661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10042561 + 6656400 = 3169^2 + 2580^2 .

It is a cyclic number.

It is not a de Polignac number, because 16698961 - 2⁷ = 16698833 is a prime.

It is not a weakly prime, because it can be changed into another prime (16698901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8349480 + 8349481.

It is an arithmetic number, because the mean of its divisors is an integer number (8349481).

Almost surely, 2^16698961 is an apocalyptic number.

It is an amenable number.

16698961 is a deficient number, since it is larger than the sum of its proper divisors (1).

16698961 is an equidigital number, since it uses as much as digits as its factorization.

16698961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 46.

The square root of 16698961 is about 4086.4362224315. The cubic root of 16698961 is about 255.6013540337.

The spelling of 16698961 in words is "sixteen million, six hundred ninety-eight thousand, nine hundred sixty-one".