389136420887 has 2 divisors, whose sum is σ = 389136420888. Its totient is φ = 389136420886.

The previous prime is 389136420811. The next prime is 389136420889. The reversal of 389136420887 is 788024631983.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 389136420887 - 2¹² = 389136416791 is a prime.

Together with 389136420889, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389136420889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194568210443 + 194568210444.

It is an arithmetic number, because the mean of its divisors is an integer number (194568210444).

Almost surely, 2^389136420887 is an apocalyptic number.

389136420887 is a deficient number, since it is larger than the sum of its proper divisors (1).

389136420887 is an equidigital number, since it uses as much as digits as its factorization.

389136420887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13934592, while the sum is 59.

The spelling of 389136420887 in words is "three hundred eighty-nine billion, one hundred thirty-six million, four hundred twenty thousand, eight hundred eighty-seven".