249903649 has 2 divisors, whose sum is σ = 249903650. Its totient is φ = 249903648.

The previous prime is 249903629. The next prime is 249903707. The reversal of 249903649 is 946309942.

249903649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147185424 + 102718225 = 12132^2 + 10135^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249903649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 249903599 and 249903608.

It is not a weakly prime, because it can be changed into another prime (249903629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124951824 + 124951825.

It is an arithmetic number, because the mean of its divisors is an integer number (124951825).

Almost surely, 2^249903649 is an apocalyptic number.

It is an amenable number.

249903649 is a deficient number, since it is larger than the sum of its proper divisors (1).

249903649 is an equidigital number, since it uses as much as digits as its factorization.

249903649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 46.

The square root of 249903649 is about 15808.3411210664. The cubic root of 249903649 is about 629.8795847796.

The spelling of 249903649 in words is "two hundred forty-nine million, nine hundred three thousand, six hundred forty-nine".