381091427593 has 2 divisors, whose sum is σ = 381091427594. Its totient is φ = 381091427592.

The previous prime is 381091427557. The next prime is 381091427627. The reversal of 381091427593 is 395724190183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 380643343369 + 448084224 = 616963^2 + 21168^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381091427593 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 381091427593.

It is not a weakly prime, because it can be changed into another prime (381091427693) 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, 190545713796 + 190545713797.

It is an arithmetic number, because the mean of its divisors is an integer number (190545713797).

Almost surely, 2^381091427593 is an apocalyptic number.

It is an amenable number.

381091427593 is a deficient number, since it is larger than the sum of its proper divisors (1).

381091427593 is an equidigital number, since it uses as much as digits as its factorization.

381091427593 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1632960, while the sum is 52.

The spelling of 381091427593 in words is "three hundred eighty-one billion, ninety-one million, four hundred twenty-seven thousand, five hundred ninety-three".