1138404461 has 2 divisors, whose sum is σ = 1138404462. Its totient is φ = 1138404460.

The previous prime is 1138404433. The next prime is 1138404479. The reversal of 1138404461 is 1644048311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1137780361 + 624100 = 33731^2 + 790^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1138404461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1138401461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569202230 + 569202231.

It is an arithmetic number, because the mean of its divisors is an integer number (569202231).

Almost surely, 2^1138404461 is an apocalyptic number.

It is an amenable number.

1138404461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1138404461 is an equidigital number, since it uses as much as digits as its factorization.

1138404461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 1138404461 is about 33740.2498657019. The cubic root of 1138404461 is about 1044.1563395905.

The spelling of 1138404461 in words is "one billion, one hundred thirty-eight million, four hundred four thousand, four hundred sixty-one".