16911397 has 2 divisors, whose sum is σ = 16911398. Its totient is φ = 16911396.

The previous prime is 16911343. The next prime is 16911407. The reversal of 16911397 is 79311961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12967201 + 3944196 = 3601^2 + 1986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16911397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16914397) 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 as a sum of consecutive naturals, namely, 8455698 + 8455699.

It is an arithmetic number, because the mean of its divisors is an integer number (8455699).

Almost surely, 2^16911397 is an apocalyptic number.

It is an amenable number.

16911397 is a deficient number, since it is larger than the sum of its proper divisors (1).

16911397 is an equidigital number, since it uses as much as digits as its factorization.

16911397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10206, while the sum is 37.

The square root of 16911397 is about 4112.3468968461. The cubic root of 16911397 is about 256.6806684515.

The spelling of 16911397 in words is "sixteen million, nine hundred eleven thousand, three hundred ninety-seven".