102806069 has 2 divisors, whose sum is σ = 102806070. Its totient is φ = 102806068.

The previous prime is 102806063. The next prime is 102806101. The reversal of 102806069 is 960608201.

It is an a-pointer prime, because the next prime (102806101) can be obtained adding 102806069 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62331025 + 40475044 = 7895^2 + 6362^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102806069 is a prime.

It is a super-2 number, since 2×102806069² = 21138175646465522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102806063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51403034 + 51403035.

It is an arithmetic number, because the mean of its divisors is an integer number (51403035).

Almost surely, 2^102806069 is an apocalyptic number.

It is an amenable number.

102806069 is a deficient number, since it is larger than the sum of its proper divisors (1).

102806069 is an equidigital number, since it uses as much as digits as its factorization.

102806069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 102806069 is about 10139.3327689745. The cubic root of 102806069 is about 468.4604354671.

The spelling of 102806069 in words is "one hundred two million, eight hundred six thousand, sixty-nine".