385780061 has 2 divisors, whose sum is σ = 385780062. Its totient is φ = 385780060.

The previous prime is 385780049. The next prime is 385780117. The reversal of 385780061 is 160087583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 361228036 + 24552025 = 19006^2 + 4955^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-385780061 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 385779997 and 385780024.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385780001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192890030 + 192890031.

It is an arithmetic number, because the mean of its divisors is an integer number (192890031).

Almost surely, 2^385780061 is an apocalyptic number.

It is an amenable number.

385780061 is a deficient number, since it is larger than the sum of its proper divisors (1).

385780061 is an equidigital number, since it uses as much as digits as its factorization.

385780061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 385780061 is about 19641.2846066646. The cubic root of 385780061 is about 727.9696261177.

The spelling of 385780061 in words is "three hundred eighty-five million, seven hundred eighty thousand, sixty-one".