1138901693 has 2 divisors, whose sum is σ = 1138901694. Its totient is φ = 1138901692.

The previous prime is 1138901671. The next prime is 1138901713. The reversal of 1138901693 is 3961098311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 826390009 + 312511684 = 28747^2 + 17678^2 .

It is a cyclic number.

It is not a de Polignac number, because 1138901693 - 2¹² = 1138897597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1138901693.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1138901633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569450846 + 569450847.

It is an arithmetic number, because the mean of its divisors is an integer number (569450847).

Almost surely, 2^1138901693 is an apocalyptic number.

It is an amenable number.

1138901693 is a deficient number, since it is larger than the sum of its proper divisors (1).

1138901693 is an equidigital number, since it uses as much as digits as its factorization.

1138901693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 1138901693 is about 33747.6175899870. The cubic root of 1138901693 is about 1044.3083395726.

The spelling of 1138901693 in words is "one billion, one hundred thirty-eight million, nine hundred one thousand, six hundred ninety-three".