1138198693 has 2 divisors, whose sum is σ = 1138198694. Its totient is φ = 1138198692.

The previous prime is 1138198673. The next prime is 1138198729. The reversal of 1138198693 is 3968918311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 728622049 + 409576644 = 26993^2 + 20238^2 .

It is a cyclic number.

It is not a de Polignac number, because 1138198693 - 2²¹ = 1136101541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1138198673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569099346 + 569099347.

It is an arithmetic number, because the mean of its divisors is an integer number (569099347).

Almost surely, 2^1138198693 is an apocalyptic number.

It is an amenable number.

1138198693 is a deficient number, since it is larger than the sum of its proper divisors (1).

1138198693 is an equidigital number, since it uses as much as digits as its factorization.

1138198693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 49.

The square root of 1138198693 is about 33737.2004321639. The cubic root of 1138198693 is about 1044.0934249541.

The spelling of 1138198693 in words is "one billion, one hundred thirty-eight million, one hundred ninety-eight thousand, six hundred ninety-three".