16788869 has 2 divisors, whose sum is σ = 16788870. Its totient is φ = 16788868.

The previous prime is 16788859. The next prime is 16788881. The reversal of 16788869 is 96888761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16507969 + 280900 = 4063^2 + 530^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16788869 is a prime.

It is a super-2 number, since 2×16788869² = 563732244598322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16788869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16788839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8394434 + 8394435.

It is an arithmetic number, because the mean of its divisors is an integer number (8394435).

Almost surely, 2^16788869 is an apocalyptic number.

It is an amenable number.

16788869 is a deficient number, since it is larger than the sum of its proper divisors (1).

16788869 is an equidigital number, since it uses as much as digits as its factorization.

16788869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 53.

The square root of 16788869 is about 4097.4222384324. The cubic root of 16788869 is about 256.0592565058.

The spelling of 16788869 in words is "sixteen million, seven hundred eighty-eight thousand, eight hundred sixty-nine".