16540417 has 2 divisors, whose sum is σ = 16540418. Its totient is φ = 16540416.

The previous prime is 16540397. The next prime is 16540429. The reversal of 16540417 is 71404561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13771521 + 2768896 = 3711^2 + 1664^2 .

It is a cyclic number.

It is not a de Polignac number, because 16540417 - 2²³ = 8151809 is a prime.

It is not a weakly prime, because it can be changed into another prime (16540457) 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, 8270208 + 8270209.

It is an arithmetic number, because the mean of its divisors is an integer number (8270209).

Almost surely, 2^16540417 is an apocalyptic number.

It is an amenable number.

16540417 is a deficient number, since it is larger than the sum of its proper divisors (1).

16540417 is an equidigital number, since it uses as much as digits as its factorization.

16540417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 16540417 is about 4066.9911482569. The cubic root of 16540417 is about 254.7898666149.

Adding to 16540417 its reverse (71404561), we get a palindrome (87944978).

The spelling of 16540417 in words is "sixteen million, five hundred forty thousand, four hundred seventeen".