890169869 has 2 divisors, whose sum is σ = 890169870. Its totient is φ = 890169868.

The previous prime is 890169859. The next prime is 890169887. The reversal of 890169869 is 968961098.

890169869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 862185769 + 27984100 = 29363^2 + 5290^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-890169869 is a prime.

It is a super-2 number, since 2×890169869² = 1584804791350954322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (890169859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445084934 + 445084935.

It is an arithmetic number, because the mean of its divisors is an integer number (445084935).

Almost surely, 2^890169869 is an apocalyptic number.

It is an amenable number.

890169869 is a deficient number, since it is larger than the sum of its proper divisors (1).

890169869 is an equidigital number, since it uses as much as digits as its factorization.

890169869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1679616, while the sum is 56.

The square root of 890169869 is about 29835.7146554260. The cubic root of 890169869 is about 961.9613651005.

The spelling of 890169869 in words is "eight hundred ninety million, one hundred sixty-nine thousand, eight hundred sixty-nine".