389491454879 has 2 divisors, whose sum is σ = 389491454880. Its totient is φ = 389491454878.

The previous prime is 389491454843. The next prime is 389491454917. The reversal of 389491454879 is 978454194983.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 389491454879 - 2⁸ = 389491454623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389491454839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194745727439 + 194745727440.

It is an arithmetic number, because the mean of its divisors is an integer number (194745727440).

Almost surely, 2^389491454879 is an apocalyptic number.

389491454879 is a deficient number, since it is larger than the sum of its proper divisors (1).

389491454879 is an equidigital number, since it uses as much as digits as its factorization.

389491454879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 313528320, while the sum is 71.

The spelling of 389491454879 in words is "three hundred eighty-nine billion, four hundred ninety-one million, four hundred fifty-four thousand, eight hundred seventy-nine".