385848781 has 2 divisors, whose sum is σ = 385848782. Its totient is φ = 385848780.

The previous prime is 385848769. The next prime is 385848791. The reversal of 385848781 is 187848583.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 314175625 + 71673156 = 17725^2 + 8466^2 .

It is a cyclic number.

It is not a de Polignac number, because 385848781 - 2¹⁹ = 385324493 is a prime.

It is a super-2 number, since 2×385848781² = 297758563598371922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385848721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192924390 + 192924391.

It is an arithmetic number, because the mean of its divisors is an integer number (192924391).

Almost surely, 2^385848781 is an apocalyptic number.

It is an amenable number.

385848781 is a deficient number, since it is larger than the sum of its proper divisors (1).

385848781 is an equidigital number, since it uses as much as digits as its factorization.

385848781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1720320, while the sum is 52.

The square root of 385848781 is about 19643.0339051787. The cubic root of 385848781 is about 728.0128485888.

The spelling of 385848781 in words is "three hundred eighty-five million, eight hundred forty-eight thousand, seven hundred eighty-one".