16881377 has 2 divisors, whose sum is σ = 16881378. Its totient is φ = 16881376.

The previous prime is 16881353. The next prime is 16881419. The reversal of 16881377 is 77318861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11316496 + 5564881 = 3364^2 + 2359^2 .

It is an emirp because it is prime and its reverse (77318861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16881377 - 2¹⁴ = 16864993 is a prime.

It is a super-2 number, since 2×16881377² = 569961778832258, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16881307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8440688 + 8440689.

It is an arithmetic number, because the mean of its divisors is an integer number (8440689).

Almost surely, 2^16881377 is an apocalyptic number.

It is an amenable number.

16881377 is a deficient number, since it is larger than the sum of its proper divisors (1).

16881377 is an equidigital number, since it uses as much as digits as its factorization.

16881377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 41.

The square root of 16881377 is about 4108.6952916954. The cubic root of 16881377 is about 256.5286976113.

The spelling of 16881377 in words is "sixteen million, eight hundred eighty-one thousand, three hundred seventy-seven".