249450389 has 2 divisors, whose sum is σ = 249450390. Its totient is φ = 249450388.

The previous prime is 249450361. The next prime is 249450391. The reversal of 249450389 is 983054942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 231952900 + 17497489 = 15230^2 + 4183^2 .

It is a cyclic number.

It is not a de Polignac number, because 249450389 - 2⁸ = 249450133 is a prime.

Together with 249450391, 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 (249450329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124725194 + 124725195.

It is an arithmetic number, because the mean of its divisors is an integer number (124725195).

Almost surely, 2^249450389 is an apocalyptic number.

It is an amenable number.

249450389 is a deficient number, since it is larger than the sum of its proper divisors (1).

249450389 is an equidigital number, since it uses as much as digits as its factorization.

249450389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 249450389 is about 15793.9985120931. The cubic root of 249450389 is about 629.4985419218.

The spelling of 249450389 in words is "two hundred forty-nine million, four hundred fifty thousand, three hundred eighty-nine".