189361439899 has 2 divisors, whose sum is σ = 189361439900. Its totient is φ = 189361439898.

The previous prime is 189361439821. The next prime is 189361439933. The reversal of 189361439899 is 998934163981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 189361439899 - 2⁹ = 189361439387 is a prime.

It is not a weakly prime, because it can be changed into another prime (189361439819) 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, 94680719949 + 94680719950.

It is an arithmetic number, because the mean of its divisors is an integer number (94680719950).

Almost surely, 2^189361439899 is an apocalyptic number.

189361439899 is a deficient number, since it is larger than the sum of its proper divisors (1).

189361439899 is an equidigital number, since it uses as much as digits as its factorization.

189361439899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90699264, while the sum is 70.

The spelling of 189361439899 in words is "one hundred eighty-nine billion, three hundred sixty-one million, four hundred thirty-nine thousand, eight hundred ninety-nine".