102823109 has 2 divisors, whose sum is σ = 102823110. Its totient is φ = 102823108.

The previous prime is 102823103. The next prime is 102823141. The reversal of 102823109 is 901328201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64754209 + 38068900 = 8047^2 + 6170^2 .

It is an emirp because it is prime and its reverse (901328201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102823109 - 2²⁴ = 86045893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102823103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51411554 + 51411555.

It is an arithmetic number, because the mean of its divisors is an integer number (51411555).

Almost surely, 2^102823109 is an apocalyptic number.

It is an amenable number.

102823109 is a deficient number, since it is larger than the sum of its proper divisors (1).

102823109 is an equidigital number, since it uses as much as digits as its factorization.

102823109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 102823109 is about 10140.1730261372. The cubic root of 102823109 is about 468.4863163154.

The spelling of 102823109 in words is "one hundred two million, eight hundred twenty-three thousand, one hundred nine".