2385676781 has 2 divisors, whose sum is σ = 2385676782. Its totient is φ = 2385676780.

The previous prime is 2385676753. The next prime is 2385676801. The reversal of 2385676781 is 1876765832.

2385676781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1623364681 + 762312100 = 40291^2 + 27610^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2385676781 is a prime.

It is a super-2 number, since 2×2385676781² = 11382907406805043922, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2385676721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1192838390 + 1192838391.

It is an arithmetic number, because the mean of its divisors is an integer number (1192838391).

Almost surely, 2^2385676781 is an apocalyptic number.

It is an amenable number.

2385676781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2385676781 is an equidigital number, since it uses as much as digits as its factorization.

2385676781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3386880, while the sum is 53.

The square root of 2385676781 is about 48843.3903512031. The cubic root of 2385676781 is about 1336.1971299244.

The spelling of 2385676781 in words is "two billion, three hundred eighty-five million, six hundred seventy-six thousand, seven hundred eighty-one".