385597789 has 2 divisors, whose sum is σ = 385597790. Its totient is φ = 385597788.

The previous prime is 385597769. The next prime is 385597801. The reversal of 385597789 is 987795583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 364160889 + 21436900 = 19083^2 + 4630^2 .

It is an emirp because it is prime and its reverse (987795583) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 385597789 - 2¹¹ = 385595741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385597769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192798894 + 192798895.

It is an arithmetic number, because the mean of its divisors is an integer number (192798895).

Almost surely, 2^385597789 is an apocalyptic number.

It is an amenable number.

385597789 is a deficient number, since it is larger than the sum of its proper divisors (1).

385597789 is an equidigital number, since it uses as much as digits as its factorization.

385597789 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 385597789 is about 19636.6440360872. The cubic root of 385597789 is about 727.8549585511.

The spelling of 385597789 in words is "three hundred eighty-five million, five hundred ninety-seven thousand, seven hundred eighty-nine".