16403197 has 2 divisors, whose sum is σ = 16403198. Its totient is φ = 16403196.

The previous prime is 16403171. The next prime is 16403227. The reversal of 16403197 is 79130461.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15729156 + 674041 = 3966^2 + 821^2 .

It is a cyclic number.

It is not a de Polignac number, because 16403197 - 2¹¹ = 16401149 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16401197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8201598 + 8201599.

It is an arithmetic number, because the mean of its divisors is an integer number (8201599).

Almost surely, 2^16403197 is an apocalyptic number.

It is an amenable number.

16403197 is a deficient number, since it is larger than the sum of its proper divisors (1).

16403197 is an equidigital number, since it uses as much as digits as its factorization.

16403197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 16403197 is about 4050.0860484686. The cubic root of 16403197 is about 254.0833266611.

The spelling of 16403197 in words is "sixteen million, four hundred three thousand, one hundred ninety-seven".