16890541 has 2 divisors, whose sum is σ = 16890542. Its totient is φ = 16890540.

The previous prime is 16890539. The next prime is 16890581. The reversal of 16890541 is 14509861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16434916 + 455625 = 4054^2 + 675^2 .

It is a cyclic number.

It is not a de Polignac number, because 16890541 - 2¹ = 16890539 is a prime.

Together with 16890539, it forms a pair of twin primes.

It is equal to p_1084678 and since 16890541 and 1084678 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 16890497 and 16890506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16890581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8445270 + 8445271.

It is an arithmetic number, because the mean of its divisors is an integer number (8445271).

Almost surely, 2^16890541 is an apocalyptic number.

It is an amenable number.

16890541 is a deficient number, since it is larger than the sum of its proper divisors (1).

16890541 is an equidigital number, since it uses as much as digits as its factorization.

16890541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 16890541 is about 4109.8103362564. The cubic root of 16890541 is about 256.5751078011.

It can be divided in two parts, 168 and 90541, that added together give a palindrome (90709).

The spelling of 16890541 in words is "sixteen million, eight hundred ninety thousand, five hundred forty-one".