169000813 has 2 divisors, whose sum is σ = 169000814. Its totient is φ = 169000812.

The previous prime is 169000789. The next prime is 169000831. The reversal of 169000813 is 318000961.

It is a happy number.

Together with next prime (169000831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157427209 + 11573604 = 12547^2 + 3402^2 .

It is a cyclic number.

It is not a de Polignac number, because 169000813 - 2⁵ = 169000781 is a prime.

It is a super-2 number, since 2×169000813² = 57122549589321938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (169000883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84500406 + 84500407.

It is an arithmetic number, because the mean of its divisors is an integer number (84500407).

Almost surely, 2^169000813 is an apocalyptic number.

It is an amenable number.

169000813 is a deficient number, since it is larger than the sum of its proper divisors (1).

169000813 is an equidigital number, since it uses as much as digits as its factorization.

169000813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 169000813 is about 13000.0312691932. The cubic root of 169000813 is about 552.8783679333.

The spelling of 169000813 in words is "one hundred sixty-nine million, eight hundred thirteen", and thus it is an aban number.