1138763869 has 2 divisors, whose sum is σ = 1138763870. Its totient is φ = 1138763868.

The previous prime is 1138763809. The next prime is 1138763891. The reversal of 1138763869 is 9683678311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1138252644 + 511225 = 33738^2 + 715^2 .

It is a cyclic number.

It is not a de Polignac number, because 1138763869 - 2¹⁵ = 1138731101 is a prime.

It is a super-2 number, since 2×1138763869² = 2593566298679698322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1138763809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569381934 + 569381935.

It is an arithmetic number, because the mean of its divisors is an integer number (569381935).

Almost surely, 2^1138763869 is an apocalyptic number.

It is an amenable number.

1138763869 is a deficient number, since it is larger than the sum of its proper divisors (1).

1138763869 is an equidigital number, since it uses as much as digits as its factorization.

1138763869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 52.

The square root of 1138763869 is about 33745.5755470254. The cubic root of 1138763869 is about 1044.2662122729.

The spelling of 1138763869 in words is "one billion, one hundred thirty-eight million, seven hundred sixty-three thousand, eight hundred sixty-nine".