16397737 has 2 divisors, whose sum is σ = 16397738. Its totient is φ = 16397736.

The previous prime is 16397713. The next prime is 16397743. The reversal of 16397737 is 73779361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9554281 + 6843456 = 3091^2 + 2616^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16397737 is a prime.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 16397693 and 16397702.

It is not a weakly prime, because it can be changed into another prime (16397747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8198868 + 8198869.

It is an arithmetic number, because the mean of its divisors is an integer number (8198869).

Almost surely, 2^16397737 is an apocalyptic number.

It is an amenable number.

16397737 is a deficient number, since it is larger than the sum of its proper divisors (1).

16397737 is an equidigital number, since it uses as much as digits as its factorization.

16397737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 166698, while the sum is 43.

The square root of 16397737 is about 4049.4119326144. The cubic root of 16397737 is about 254.0551319761.

The spelling of 16397737 in words is "sixteen million, three hundred ninety-seven thousand, seven hundred thirty-seven".