249450137 has 2 divisors, whose sum is σ = 249450138. Its totient is φ = 249450136.

The previous prime is 249450133. The next prime is 249450139. The reversal of 249450137 is 731054942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192959881 + 56490256 = 13891^2 + 7516^2 .

It is a cyclic number.

It is not a de Polignac number, because 249450137 - 2² = 249450133 is a prime.

Together with 249450139, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 249450097 and 249450106.

It is not a weakly prime, because it can be changed into another prime (249450133) 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, 124725068 + 124725069.

It is an arithmetic number, because the mean of its divisors is an integer number (124725069).

Almost surely, 2^249450137 is an apocalyptic number.

It is an amenable number.

249450137 is a deficient number, since it is larger than the sum of its proper divisors (1).

249450137 is an equidigital number, since it uses as much as digits as its factorization.

249450137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 249450137 is about 15793.9905343773. The cubic root of 249450137 is about 629.4983299442.

The spelling of 249450137 in words is "two hundred forty-nine million, four hundred fifty thousand, one hundred thirty-seven".