16972961 has 2 divisors, whose sum is σ = 16972962. Its totient is φ = 16972960.

The previous prime is 16972957. The next prime is 16972979. The reversal of 16972961 is 16927961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10627600 + 6345361 = 3260^2 + 2519^2 .

It is an emirp because it is prime and its reverse (16927961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16972961 - 2² = 16972957 is a prime.

It is not a weakly prime, because it can be changed into another prime (16972931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8486480 + 8486481.

It is an arithmetic number, because the mean of its divisors is an integer number (8486481).

Almost surely, 2^16972961 is an apocalyptic number.

It is an amenable number.

16972961 is a deficient number, since it is larger than the sum of its proper divisors (1).

16972961 is an equidigital number, since it uses as much as digits as its factorization.

16972961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 41.

The square root of 16972961 is about 4119.8253603763. The cubic root of 16972961 is about 256.9917634266.

The spelling of 16972961 in words is "sixteen million, nine hundred seventy-two thousand, nine hundred sixty-one".