2398963781 has 4 divisors (see below), whose sum is σ = 2481686700. Its totient is φ = 2316240864.

The previous prime is 2398963771. The next prime is 2398963811. The reversal of 2398963781 is 1873698932.

2398963781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1495059556 + 903904225 = 38666^2 + 30065^2 .

It is a cyclic number.

It is not a de Polignac number, because 2398963781 - 2¹⁰ = 2398962757 is a prime.

It is a super-2 number, since 2×2398963781² = 11510054445099631922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2398963711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41361416 + ... + 41361473.

It is an arithmetic number, because the mean of its divisors is an integer number (620421675).

Almost surely, 2^2398963781 is an apocalyptic number.

It is an amenable number.

2398963781 is a deficient number, since it is larger than the sum of its proper divisors (82722919).

2398963781 is an equidigital number, since it uses as much as digits as its factorization.

2398963781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82722918.

The product of its digits is 3919104, while the sum is 56.

The square root of 2398963781 is about 48979.2178479812. The cubic root of 2398963781 is about 1338.6731837755.

The spelling of 2398963781 in words is "two billion, three hundred ninety-eight million, nine hundred sixty-three thousand, seven hundred eighty-one".