389575987 has 2 divisors, whose sum is σ = 389575988. Its totient is φ = 389575986.

The previous prime is 389575933. The next prime is 389576017. The reversal of 389575987 is 789575983.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 389575987 - 2¹⁹ = 389051699 is a prime.

It is not a weakly prime, because it can be changed into another prime (389575187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194787993 + 194787994.

It is an arithmetic number, because the mean of its divisors is an integer number (194787994).

Almost surely, 2^389575987 is an apocalyptic number.

389575987 is a deficient number, since it is larger than the sum of its proper divisors (1).

389575987 is an equidigital number, since it uses as much as digits as its factorization.

389575987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19051200, while the sum is 61.

The square root of 389575987 is about 19737.6793722058. The cubic root of 389575987 is about 730.3494836263.

It can be divided in two parts, 38957 and 5987, that added together give a palindrome (44944).

The spelling of 389575987 in words is "three hundred eighty-nine million, five hundred seventy-five thousand, nine hundred eighty-seven".