2385745981 has 2 divisors, whose sum is σ = 2385745982. Its totient is φ = 2385745980.

The previous prime is 2385745979. The next prime is 2385746003. The reversal of 2385745981 is 1895475832.

It is a happy number.

2385745981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2268997956 + 116748025 = 47634^2 + 10805^2 .

It is a cyclic number.

It is not a de Polignac number, because 2385745981 - 2¹ = 2385745979 is a prime.

It is a super-2 number, since 2×2385745981² = 11383567771715304722, which contains 22 as substring.

Together with 2385745979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2385745951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1192872990 + 1192872991.

It is an arithmetic number, because the mean of its divisors is an integer number (1192872991).

Almost surely, 2^2385745981 is an apocalyptic number.

It is an amenable number.

2385745981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2385745981 is an equidigital number, since it uses as much as digits as its factorization.

2385745981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2419200, while the sum is 52.

The square root of 2385745981 is about 48844.0987326002. The cubic root of 2385745981 is about 1336.2100492419.

The spelling of 2385745981 in words is "two billion, three hundred eighty-five million, seven hundred forty-five thousand, nine hundred eighty-one".