16897261 has 2 divisors, whose sum is σ = 16897262. Its totient is φ = 16897260.

The previous prime is 16897241. The next prime is 16897267. The reversal of 16897261 is 16279861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16859236 + 38025 = 4106^2 + 195^2 .

It is a cyclic number.

It is not a de Polignac number, because 16897261 - 2¹³ = 16889069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16897267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8448630 + 8448631.

It is an arithmetic number, because the mean of its divisors is an integer number (8448631).

Almost surely, 2^16897261 is an apocalyptic number.

It is an amenable number.

16897261 is a deficient number, since it is larger than the sum of its proper divisors (1).

16897261 is an equidigital number, since it uses as much as digits as its factorization.

16897261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 40.

The square root of 16897261 is about 4110.6278109311. The cubic root of 16897261 is about 256.6091299227.

The spelling of 16897261 in words is "sixteen million, eight hundred ninety-seven thousand, two hundred sixty-one".