102919109 has 2 divisors, whose sum is σ = 102919110. Its totient is φ = 102919108.

The previous prime is 102919099. The next prime is 102919121. The reversal of 102919109 is 901919201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92582884 + 10336225 = 9622^2 + 3215^2 .

It is a cyclic number.

It is not a de Polignac number, because 102919109 - 2¹² = 102915013 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102919189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51459554 + 51459555.

It is an arithmetic number, because the mean of its divisors is an integer number (51459555).

Almost surely, 2^102919109 is an apocalyptic number.

It is an amenable number.

102919109 is a deficient number, since it is larger than the sum of its proper divisors (1).

102919109 is an equidigital number, since it uses as much as digits as its factorization.

102919109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 32.

The square root of 102919109 is about 10144.9055688064. The cubic root of 102919109 is about 468.6320705053.

The spelling of 102919109 in words is "one hundred two million, nine hundred nineteen thousand, one hundred nine".