123550919 has 2 divisors, whose sum is σ = 123550920. Its totient is φ = 123550918.

The previous prime is 123550873. The next prime is 123550969. The reversal of 123550919 is 919055321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123550919 - 2²⁰ = 122502343 is a prime.

It is a super-2 number, since 2×123550919² = 30529659171489122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123550969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61775459 + 61775460.

It is an arithmetic number, because the mean of its divisors is an integer number (61775460).

Almost surely, 2^123550919 is an apocalyptic number.

123550919 is a deficient number, since it is larger than the sum of its proper divisors (1).

123550919 is an equidigital number, since it uses as much as digits as its factorization.

123550919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12150, while the sum is 35.

The square root of 123550919 is about 11115.3461034733. The cubic root of 123550919 is about 498.0603774583.

The spelling of 123550919 in words is "one hundred twenty-three million, five hundred fifty thousand, nine hundred nineteen".