123947249 has 2 divisors, whose sum is σ = 123947250. Its totient is φ = 123947248.

The previous prime is 123947237. The next prime is 123947267. The reversal of 123947249 is 942749321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122257249 + 1690000 = 11057^2 + 1300^2 .

It is a cyclic number.

It is not a de Polignac number, because 123947249 - 2²⁴ = 107170033 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123947209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61973624 + 61973625.

It is an arithmetic number, because the mean of its divisors is an integer number (61973625).

Almost surely, 2^123947249 is an apocalyptic number.

It is an amenable number.

123947249 is a deficient number, since it is larger than the sum of its proper divisors (1).

123947249 is an equidigital number, since it uses as much as digits as its factorization.

123947249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 41.

The square root of 123947249 is about 11133.1598838784. The cubic root of 123947249 is about 498.5923728906.

The spelling of 123947249 in words is "one hundred twenty-three million, nine hundred forty-seven thousand, two hundred forty-nine".