16890737 has 2 divisors, whose sum is σ = 16890738. Its totient is φ = 16890736.

The previous prime is 16890659. The next prime is 16890773. The reversal of 16890737 is 73709861.

Together with next prime (16890773) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15689521 + 1201216 = 3961^2 + 1096^2 .

It is an emirp because it is prime and its reverse (73709861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16890737 - 2⁸ = 16890481 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 16890694 and 16890703.

It is not a weakly prime, because it can be changed into another prime (16890037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8445368 + 8445369.

It is an arithmetic number, because the mean of its divisors is an integer number (8445369).

Almost surely, 2^16890737 is an apocalyptic number.

It is an amenable number.

16890737 is a deficient number, since it is larger than the sum of its proper divisors (1).

16890737 is an equidigital number, since it uses as much as digits as its factorization.

16890737 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 16890737 is about 4109.8341815699. The cubic root of 16890737 is about 256.5761002408.

The spelling of 16890737 in words is "sixteen million, eight hundred ninety thousand, seven hundred thirty-seven".