389786077 has 2 divisors, whose sum is σ = 389786078. Its totient is φ = 389786076.

The previous prime is 389786039. The next prime is 389786171. The reversal of 389786077 is 770687983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 383924836 + 5861241 = 19594^2 + 2421^2 .

It is a cyclic number.

It is not a de Polignac number, because 389786077 - 2²⁷ = 255568349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389786017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194893038 + 194893039.

It is an arithmetic number, because the mean of its divisors is an integer number (194893039).

Almost surely, 2^389786077 is an apocalyptic number.

It is an amenable number.

389786077 is a deficient number, since it is larger than the sum of its proper divisors (1).

389786077 is an equidigital number, since it uses as much as digits as its factorization.

389786077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3556224, while the sum is 55.

The square root of 389786077 is about 19743.0007091121. Note that the first 3 decimals coincide. The cubic root of 389786077 is about 730.4807473200.

The spelling of 389786077 in words is "three hundred eighty-nine million, seven hundred eighty-six thousand, seventy-seven".