16806949 has 2 divisors, whose sum is σ = 16806950. Its totient is φ = 16806948.

The previous prime is 16806941. The next prime is 16806953. The reversal of 16806949 is 94960861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15856324 + 950625 = 3982^2 + 975^2 .

It is a cyclic number.

It is not a de Polignac number, because 16806949 - 2³ = 16806941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16806941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8403474 + 8403475.

It is an arithmetic number, because the mean of its divisors is an integer number (8403475).

Almost surely, 2^16806949 is an apocalyptic number.

It is an amenable number.

16806949 is a deficient number, since it is larger than the sum of its proper divisors (1).

16806949 is an equidigital number, since it uses as much as digits as its factorization.

16806949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 16806949 is about 4099.6279099450. The cubic root of 16806949 is about 256.1511406085.

The spelling of 16806949 in words is "sixteen million, eight hundred six thousand, nine hundred forty-nine".