385780001 has 2 divisors, whose sum is σ = 385780002. Its totient is φ = 385780000.

The previous prime is 385779983. The next prime is 385780039. The reversal of 385780001 is 100087583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 322561600 + 63218401 = 17960^2 + 7951^2 .

It is a cyclic number.

It is not a de Polignac number, because 385780001 - 2¹⁴ = 385763617 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 385780001.

It is not a weakly prime, because it can be changed into another prime (385780061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192890000 + 192890001.

It is an arithmetic number, because the mean of its divisors is an integer number (192890001).

Almost surely, 2^385780001 is an apocalyptic number.

It is an amenable number.

385780001 is a deficient number, since it is larger than the sum of its proper divisors (1).

385780001 is an equidigital number, since it uses as much as digits as its factorization.

385780001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 385780001 is about 19641.2830792695. The cubic root of 385780001 is about 727.9695883776.

The spelling of 385780001 in words is "three hundred eighty-five million, seven hundred eighty thousand, one".