385696820909 has 2 divisors, whose sum is σ = 385696820910. Its totient is φ = 385696820908.

The previous prime is 385696820903. The next prime is 385696820959. The reversal of 385696820909 is 909028696583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203044866025 + 182651954884 = 450605^2 + 427378^2 .

It is a cyclic number.

It is not a de Polignac number, because 385696820909 - 2⁸ = 385696820653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385696820903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192848410454 + 192848410455.

It is an arithmetic number, because the mean of its divisors is an integer number (192848410455).

Almost surely, 2^385696820909 is an apocalyptic number.

It is an amenable number.

385696820909 is a deficient number, since it is larger than the sum of its proper divisors (1).

385696820909 is an equidigital number, since it uses as much as digits as its factorization.

385696820909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50388480, while the sum is 65.

The spelling of 385696820909 in words is "three hundred eighty-five billion, six hundred ninety-six million, eight hundred twenty thousand, nine hundred nine".