16769881 has 2 divisors, whose sum is σ = 16769882. Its totient is φ = 16769880.

The previous prime is 16769873. The next prime is 16769887. The reversal of 16769881 is 18896761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11289600 + 5480281 = 3360^2 + 2341^2 .

It is a cyclic number.

It is not a de Polignac number, because 16769881 - 2³ = 16769873 is a prime.

It is a super-2 number, since 2×16769881² = 562457817508322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16769887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8384940 + 8384941.

It is an arithmetic number, because the mean of its divisors is an integer number (8384941).

Almost surely, 2^16769881 is an apocalyptic number.

It is an amenable number.

16769881 is a deficient number, since it is larger than the sum of its proper divisors (1).

16769881 is an equidigital number, since it uses as much as digits as its factorization.

16769881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 46.

The square root of 16769881 is about 4095.1045163707. The cubic root of 16769881 is about 255.9626868224.

The spelling of 16769881 in words is "sixteen million, seven hundred sixty-nine thousand, eight hundred eighty-one".