385669789 has 2 divisors, whose sum is σ = 385669790. Its totient is φ = 385669788.

The previous prime is 385669723. The next prime is 385669793. The reversal of 385669789 is 987966583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192932100 + 192737689 = 13890^2 + 13883^2 .

It is a cyclic number.

It is not a de Polignac number, because 385669789 - 2¹³ = 385661597 is a prime.

It is a super-2 number, since 2×385669789² = 297482372294609042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385660789) 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, 192834894 + 192834895.

It is an arithmetic number, because the mean of its divisors is an integer number (192834895).

Almost surely, 2^385669789 is an apocalyptic number.

It is an amenable number.

385669789 is a deficient number, since it is larger than the sum of its proper divisors (1).

385669789 is an equidigital number, since it uses as much as digits as its factorization.

385669789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19595520, while the sum is 61.

The square root of 385669789 is about 19638.4772576694. The cubic root of 385669789 is about 727.9002581673.

The spelling of 385669789 in words is "three hundred eighty-five million, six hundred sixty-nine thousand, seven hundred eighty-nine".