389000077 has 2 divisors, whose sum is σ = 389000078. Its totient is φ = 389000076.

The previous prime is 389000071. The next prime is 389000107. The reversal of 389000077 is 770000983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 305935081 + 83064996 = 17491^2 + 9114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-389000077 is a prime.

It is equal to p_20780647 and since 389000077 and 20780647 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389000071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194500038 + 194500039.

It is an arithmetic number, because the mean of its divisors is an integer number (194500039).

Almost surely, 2^389000077 is an apocalyptic number.

It is an amenable number.

389000077 is a deficient number, since it is larger than the sum of its proper divisors (1).

389000077 is an equidigital number, since it uses as much as digits as its factorization.

389000077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 389000077 is about 19723.0848753434. The cubic root of 389000077 is about 729.9894143708.

The spelling of 389000077 in words is "three hundred eighty-nine million, seventy-seven", and thus it is an aban number.