248707649 has 2 divisors, whose sum is σ = 248707650. Its totient is φ = 248707648.

The previous prime is 248707643. The next prime is 248707687. The reversal of 248707649 is 946707842.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 225600400 + 23107249 = 15020^2 + 4807^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-248707649 is a prime.

It is a super-2 number, since 2×248707649² = 123710989342214402, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (248707643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124353824 + 124353825.

It is an arithmetic number, because the mean of its divisors is an integer number (124353825).

Almost surely, 2^248707649 is an apocalyptic number.

It is an amenable number.

248707649 is a deficient number, since it is larger than the sum of its proper divisors (1).

248707649 is an equidigital number, since it uses as much as digits as its factorization.

248707649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 677376, while the sum is 47.

The square root of 248707649 is about 15770.4676214753. The cubic root of 248707649 is about 628.8731422635.

The spelling of 248707649 in words is "two hundred forty-eight million, seven hundred seven thousand, six hundred forty-nine".