38919191093 has 2 divisors, whose sum is σ = 38919191094. Its totient is φ = 38919191092.

The previous prime is 38919191057. The next prime is 38919191099. The reversal of 38919191093 is 39019191983.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33858576049 + 5060615044 = 184007^2 + 71138^2 .

It is a cyclic number.

It is not a de Polignac number, because 38919191093 - 2⁶ = 38919191029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38919191099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19459595546 + 19459595547.

It is an arithmetic number, because the mean of its divisors is an integer number (19459595547).

Almost surely, 2^38919191093 is an apocalyptic number.

It is an amenable number.

38919191093 is a deficient number, since it is larger than the sum of its proper divisors (1).

38919191093 is an equidigital number, since it uses as much as digits as its factorization.

38919191093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 472392, while the sum is 53.

The spelling of 38919191093 in words is "thirty-eight billion, nine hundred nineteen million, one hundred ninety-one thousand, ninety-three".