1249853089 has 2 divisors, whose sum is σ = 1249853090. Its totient is φ = 1249853088.

The previous prime is 1249853069. The next prime is 1249853113. The reversal of 1249853089 is 9803589421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 649995025 + 599858064 = 25495^2 + 24492^2 .

It is a cyclic number.

It is not a de Polignac number, because 1249853089 - 2²¹ = 1247755937 is a prime.

It is not a weakly prime, because it can be changed into another prime (1249853029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624926544 + 624926545.

It is an arithmetic number, because the mean of its divisors is an integer number (624926545).

Almost surely, 2^1249853089 is an apocalyptic number.

It is an amenable number.

1249853089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249853089 is an equidigital number, since it uses as much as digits as its factorization.

1249853089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 622080, while the sum is 49.

The square root of 1249853089 is about 35353.2613629917. The cubic root of 1249853089 is about 1077.1751420086.

The spelling of 1249853089 in words is "one billion, two hundred forty-nine million, eight hundred fifty-three thousand, eighty-nine".