16040917 has 2 divisors, whose sum is σ = 16040918. Its totient is φ = 16040916.

The previous prime is 16040909. The next prime is 16040923. The reversal of 16040917 is 71904061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15673681 + 367236 = 3959^2 + 606^2 .

It is a cyclic number.

It is not a de Polignac number, because 16040917 - 2³ = 16040909 is a prime.

It is a super-2 number, since 2×16040917² = 514622036401778, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16040977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8020458 + 8020459.

It is an arithmetic number, because the mean of its divisors is an integer number (8020459).

Almost surely, 2^16040917 is an apocalyptic number.

It is an amenable number.

16040917 is a deficient number, since it is larger than the sum of its proper divisors (1).

16040917 is an equidigital number, since it uses as much as digits as its factorization.

16040917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 16040917 is about 4005.1113592508. Note that the first 3 decimals coincide. The cubic root of 16040917 is about 252.1988279244.

Adding to 16040917 its reverse (71904061), we get a palindrome (87944978).

The spelling of 16040917 in words is "sixteen million, forty thousand, nine hundred seventeen".