123132109 has 2 divisors, whose sum is σ = 123132110. Its totient is φ = 123132108.

The previous prime is 123132101. The next prime is 123132137. The reversal of 123132109 is 901231321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121110025 + 2022084 = 11005^2 + 1422^2 .

It is an emirp because it is prime and its reverse (901231321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123132109 - 2³ = 123132101 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123132109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123132101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61566054 + 61566055.

It is an arithmetic number, because the mean of its divisors is an integer number (61566055).

Almost surely, 2^123132109 is an apocalyptic number.

It is an amenable number.

123132109 is a deficient number, since it is larger than the sum of its proper divisors (1).

123132109 is an equidigital number, since it uses as much as digits as its factorization.

123132109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 123132109 is about 11096.4908417031. The cubic root of 123132109 is about 497.4969692500.

The spelling of 123132109 in words is "one hundred twenty-three million, one hundred thirty-two thousand, one hundred nine".