123758449 has 2 divisors, whose sum is σ = 123758450. Its totient is φ = 123758448.

The previous prime is 123758413. The next prime is 123758461. The reversal of 123758449 is 944857321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117332224 + 6426225 = 10832^2 + 2535^2 .

It is an emirp because it is prime and its reverse (944857321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123758449 - 2⁷ = 123758321 is a prime.

It is not a weakly prime, because it can be changed into another prime (123752449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61879224 + 61879225.

It is an arithmetic number, because the mean of its divisors is an integer number (61879225).

Almost surely, 2^123758449 is an apocalyptic number.

It is an amenable number.

123758449 is a deficient number, since it is larger than the sum of its proper divisors (1).

123758449 is an equidigital number, since it uses as much as digits as its factorization.

123758449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 43.

The square root of 123758449 is about 11124.6774784710. The cubic root of 123758449 is about 498.3390875152.

The spelling of 123758449 in words is "one hundred twenty-three million, seven hundred fifty-eight thousand, four hundred forty-nine".