123292009 has 2 divisors, whose sum is σ = 123292010. Its totient is φ = 123292008.

The previous prime is 123292003. The next prime is 123292049. The reversal of 123292009 is 900292321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74011609 + 49280400 = 8603^2 + 7020^2 .

It is an emirp because it is prime and its reverse (900292321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123292009 - 2⁵ = 123291977 is a prime.

It is not a weakly prime, because it can be changed into another prime (123292003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61646004 + 61646005.

It is an arithmetic number, because the mean of its divisors is an integer number (61646005).

Almost surely, 2^123292009 is an apocalyptic number.

It is an amenable number.

123292009 is a deficient number, since it is larger than the sum of its proper divisors (1).

123292009 is an equidigital number, since it uses as much as digits as its factorization.

123292009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 123292009 is about 11103.6934846023. The cubic root of 123292009 is about 497.7122268197.

The spelling of 123292009 in words is "one hundred twenty-three million, two hundred ninety-two thousand, nine".