389475861091 has 2 divisors, whose sum is σ = 389475861092. Its totient is φ = 389475861090.

The previous prime is 389475861023. The next prime is 389475861101. The reversal of 389475861091 is 190168574983.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 389475861091 - 2¹⁷ = 389475730019 is a prime.

It is not a weakly prime, because it can be changed into another prime (389475861391) 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, 194737930545 + 194737930546.

It is an arithmetic number, because the mean of its divisors is an integer number (194737930546).

Almost surely, 2^389475861091 is an apocalyptic number.

389475861091 is a deficient number, since it is larger than the sum of its proper divisors (1).

389475861091 is an equidigital number, since it uses as much as digits as its factorization.

389475861091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13063680, while the sum is 61.

The spelling of 389475861091 in words is "three hundred eighty-nine billion, four hundred seventy-five million, eight hundred sixty-one thousand, ninety-one".