123119551 has 2 divisors, whose sum is σ = 123119552. Its totient is φ = 123119550.

The previous prime is 123119543. The next prime is 123119561. The reversal of 123119551 is 155911321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123119551 - 2³ = 123119543 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 (123119561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61559775 + 61559776.

It is an arithmetic number, because the mean of its divisors is an integer number (61559776).

Almost surely, 2^123119551 is an apocalyptic number.

123119551 is a deficient number, since it is larger than the sum of its proper divisors (1).

123119551 is an equidigital number, since it uses as much as digits as its factorization.

123119551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1350, while the sum is 28.

The square root of 123119551 is about 11095.9249727096. The cubic root of 123119551 is about 497.4800557647.

The spelling of 123119551 in words is "one hundred twenty-three million, one hundred nineteen thousand, five hundred fifty-one".