123212087 has 2 divisors, whose sum is σ = 123212088. Its totient is φ = 123212086.

The previous prime is 123212083. The next prime is 123212143. The reversal of 123212087 is 780212321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123212087 - 2² = 123212083 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123212083) 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, 61606043 + 61606044.

It is an arithmetic number, because the mean of its divisors is an integer number (61606044).

Almost surely, 2^123212087 is an apocalyptic number.

123212087 is a deficient number, since it is larger than the sum of its proper divisors (1).

123212087 is an equidigital number, since it uses as much as digits as its factorization.

123212087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 123212087 is about 11100.0940086109. The cubic root of 123212087 is about 497.6046590079.

The spelling of 123212087 in words is "one hundred twenty-three million, two hundred twelve thousand, eighty-seven".