1138866049 has 2 divisors, whose sum is σ = 1138866050. Its totient is φ = 1138866048.

The previous prime is 1138866041. The next prime is 1138866097. The reversal of 1138866049 is 9406688311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1130640625 + 8225424 = 33625^2 + 2868^2 .

It is a cyclic number.

It is not a de Polignac number, because 1138866049 - 2³ = 1138866041 is a prime.

It is not a weakly prime, because it can be changed into another prime (1138866041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569433024 + 569433025.

It is an arithmetic number, because the mean of its divisors is an integer number (569433025).

Almost surely, 2^1138866049 is an apocalyptic number.

It is an amenable number.

1138866049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1138866049 is an equidigital number, since it uses as much as digits as its factorization.

1138866049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 1138866049 is about 33747.0894893174. The cubic root of 1138866049 is about 1044.2974449493.

The spelling of 1138866049 in words is "one billion, one hundred thirty-eight million, eight hundred sixty-six thousand, forty-nine".