249953747 has 2 divisors, whose sum is σ = 249953748. Its totient is φ = 249953746.

The previous prime is 249953707. The next prime is 249953749. The reversal of 249953747 is 747359942.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249953747 is a prime.

Together with 249953749, 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 = 249953695 and 249953704.

It is not a weakly prime, because it can be changed into another prime (249953749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124976873 + 124976874.

It is an arithmetic number, because the mean of its divisors is an integer number (124976874).

Almost surely, 2^249953747 is an apocalyptic number.

249953747 is a deficient number, since it is larger than the sum of its proper divisors (1).

249953747 is an equidigital number, since it uses as much as digits as its factorization.

249953747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 50.

The square root of 249953747 is about 15809.9255848976. The cubic root of 249953747 is about 629.9216724657.

The spelling of 249953747 in words is "two hundred forty-nine million, nine hundred fifty-three thousand, seven hundred forty-seven".