385555061 has 2 divisors, whose sum is σ = 385555062. Its totient is φ = 385555060.

The previous prime is 385555057. The next prime is 385555069. The reversal of 385555061 is 160555583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 382202500 + 3352561 = 19550^2 + 1831^2 .

It is a cyclic number.

It is not a de Polignac number, because 385555061 - 2² = 385555057 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385555069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192777530 + 192777531.

It is an arithmetic number, because the mean of its divisors is an integer number (192777531).

Almost surely, 2^385555061 is an apocalyptic number.

It is an amenable number.

385555061 is a deficient number, since it is larger than the sum of its proper divisors (1).

385555061 is an equidigital number, since it uses as much as digits as its factorization.

385555061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90000, while the sum is 38.

The square root of 385555061 is about 19635.5560400005. The cubic root of 385555061 is about 727.8280730793.

The spelling of 385555061 in words is "three hundred eighty-five million, five hundred fifty-five thousand, sixty-one".