249615349 has 2 divisors, whose sum is σ = 249615350. Its totient is φ = 249615348.

The previous prime is 249615347. The next prime is 249615409. The reversal of 249615349 is 943516942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145371249 + 104244100 = 12057^2 + 10210^2 .

It is a cyclic number.

It is not a de Polignac number, because 249615349 - 2¹ = 249615347 is a prime.

Together with 249615347, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249615347) 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, 124807674 + 124807675.

It is an arithmetic number, because the mean of its divisors is an integer number (124807675).

Almost surely, 2^249615349 is an apocalyptic number.

It is an amenable number.

249615349 is a deficient number, since it is larger than the sum of its proper divisors (1).

249615349 is an equidigital number, since it uses as much as digits as its factorization.

249615349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 43.

The square root of 249615349 is about 15799.2198858045. The cubic root of 249615349 is about 629.6372725104.

The spelling of 249615349 in words is "two hundred forty-nine million, six hundred fifteen thousand, three hundred forty-nine".