123342649 has 2 divisors, whose sum is σ = 123342650. Its totient is φ = 123342648.

The previous prime is 123342587. The next prime is 123342677. The reversal of 123342649 is 946243321.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116748025 + 6594624 = 10805^2 + 2568^2 .

It is an emirp because it is prime and its reverse (946243321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123342649 - 2⁹ = 123342137 is a prime.

It is not a weakly prime, because it can be changed into another prime (123342449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61671324 + 61671325.

It is an arithmetic number, because the mean of its divisors is an integer number (61671325).

Almost surely, 2^123342649 is an apocalyptic number.

It is an amenable number.

123342649 is a deficient number, since it is larger than the sum of its proper divisors (1).

123342649 is an equidigital number, since it uses as much as digits as its factorization.

123342649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 34.

The square root of 123342649 is about 11105.9735728121. The cubic root of 123342649 is about 497.7803596410.

The spelling of 123342649 in words is "one hundred twenty-three million, three hundred forty-two thousand, six hundred forty-nine".