389657087 has 2 divisors, whose sum is σ = 389657088. Its totient is φ = 389657086.

The previous prime is 389657083. The next prime is 389657117. The reversal of 389657087 is 780756983.

It is a weak prime.

It is an emirp because it is prime and its reverse (780756983) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 389657087 - 2² = 389657083 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389657083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194828543 + 194828544.

It is an arithmetic number, because the mean of its divisors is an integer number (194828544).

Almost surely, 2^389657087 is an apocalyptic number.

389657087 is a deficient number, since it is larger than the sum of its proper divisors (1).

389657087 is an equidigital number, since it uses as much as digits as its factorization.

389657087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2540160, while the sum is 53.

The square root of 389657087 is about 19739.7337114765. The cubic root of 389657087 is about 730.4001602896.

The spelling of 389657087 in words is "three hundred eighty-nine million, six hundred fifty-seven thousand, eighty-seven".