16881061 has 2 divisors, whose sum is σ = 16881062. Its totient is φ = 16881060.

The previous prime is 16881047. The next prime is 16881077. The reversal of 16881061 is 16018861.

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., 12496225 + 4384836 = 3535^2 + 2094^2 .

It is an emirp because it is prime and its reverse (16018861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16881061 - 2⁷ = 16880933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16881001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8440530 + 8440531.

It is an arithmetic number, because the mean of its divisors is an integer number (8440531).

Almost surely, 2^16881061 is an apocalyptic number.

It is an amenable number.

16881061 is a deficient number, since it is larger than the sum of its proper divisors (1).

16881061 is an equidigital number, since it uses as much as digits as its factorization.

16881061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 16881061 is about 4108.6568364856. The cubic root of 16881061 is about 256.5270969604.

The spelling of 16881061 in words is "sixteen million, eight hundred eighty-one thousand, sixty-one".