2388325781 has 2 divisors, whose sum is σ = 2388325782. Its totient is φ = 2388325780.

The previous prime is 2388325703. The next prime is 2388325811. The reversal of 2388325781 is 1875238832.

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., 2191176100 + 197149681 = 46810^2 + 14041^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2388325781 is a prime.

It is a super-2 number, since 2×2388325781² = 11408200072378519922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2388328781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1194162890 + 1194162891.

It is an arithmetic number, because the mean of its divisors is an integer number (1194162891).

Almost surely, 2^2388325781 is an apocalyptic number.

It is an amenable number.

2388325781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2388325781 is an equidigital number, since it uses as much as digits as its factorization.

2388325781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 645120, while the sum is 47.

The square root of 2388325781 is about 48870.5001099846. The cubic root of 2388325781 is about 1336.6915077241.

The spelling of 2388325781 in words is "two billion, three hundred eighty-eight million, three hundred twenty-five thousand, seven hundred eighty-one".