123248549 has 2 divisors, whose sum is σ = 123248550. Its totient is φ = 123248548.

The previous prime is 123248533. The next prime is 123248551. The reversal of 123248549 is 945842321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120846049 + 2402500 = 10993^2 + 1550^2 .

It is an emirp because it is prime and its reverse (945842321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123248549 - 2⁴ = 123248533 is a prime.

Together with 123248551, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123248569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61624274 + 61624275.

It is an arithmetic number, because the mean of its divisors is an integer number (61624275).

Almost surely, 2^123248549 is an apocalyptic number.

It is an amenable number.

123248549 is a deficient number, since it is larger than the sum of its proper divisors (1).

123248549 is an equidigital number, since it uses as much as digits as its factorization.

123248549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 38.

The square root of 123248549 is about 11101.7363056416. The cubic root of 123248549 is about 497.6537393432.

The spelling of 123248549 in words is "one hundred twenty-three million, two hundred forty-eight thousand, five hundred forty-nine".