1249649047 has 2 divisors, whose sum is σ = 1249649048. Its totient is φ = 1249649046.

The previous prime is 1249649003. The next prime is 1249649053. The reversal of 1249649047 is 7409469421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1249649047 - 2¹⁵ = 1249616279 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1249648988 and 1249649006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1249649077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624824523 + 624824524.

It is an arithmetic number, because the mean of its divisors is an integer number (624824524).

Almost surely, 2^1249649047 is an apocalyptic number.

1249649047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249649047 is an equidigital number, since it uses as much as digits as its factorization.

1249649047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 1249649047 is about 35350.3754859832. The cubic root of 1249649047 is about 1077.1165215372.

The spelling of 1249649047 in words is "one billion, two hundred forty-nine million, six hundred forty-nine thousand, forty-seven".