16400017 has 2 divisors, whose sum is σ = 16400018. Its totient is φ = 16400016.

The previous prime is 16399987. The next prime is 16400047. The reversal of 16400017 is 71000461.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (16399987) and next prime (16400047).

It can be written as a sum of positive squares in only one way, i.e., 9634816 + 6765201 = 3104^2 + 2601^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16400017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16399967 and 16400003.

It is not a weakly prime, because it can be changed into another prime (16400047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8200008 + 8200009.

It is an arithmetic number, because the mean of its divisors is an integer number (8200009).

Almost surely, 2^16400017 is an apocalyptic number.

It is an amenable number.

16400017 is a deficient number, since it is larger than the sum of its proper divisors (1).

16400017 is an equidigital number, since it uses as much as digits as its factorization.

16400017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 16400017 is about 4049.6934451882. The cubic root of 16400017 is about 254.0669063418.

Adding to 16400017 its reverse (71000461), we get a palindrome (87400478).

The spelling of 16400017 in words is "sixteen million, four hundred thousand, seventeen".