16906973 has 2 divisors, whose sum is σ = 16906974. Its totient is φ = 16906972.

The previous prime is 16906969. The next prime is 16907057. The reversal of 16906973 is 37960961.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9078169 + 7828804 = 3013^2 + 2798^2 .

It is an emirp because it is prime and its reverse (37960961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16906973 - 2² = 16906969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16906973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16906933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8453486 + 8453487.

It is an arithmetic number, because the mean of its divisors is an integer number (8453487).

Almost surely, 2^16906973 is an apocalyptic number.

It is an amenable number.

16906973 is a deficient number, since it is larger than the sum of its proper divisors (1).

16906973 is an equidigital number, since it uses as much as digits as its factorization.

16906973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 16906973 is about 4111.8089692981. The cubic root of 16906973 is about 256.6582840537.

The spelling of 16906973 in words is "sixteen million, nine hundred six thousand, nine hundred seventy-three".