2398681 has 2 divisors, whose sum is σ = 2398682. Its totient is φ = 2398680.

The previous prime is 2398679. The next prime is 2398699. The reversal of 2398681 is 1868932.

2398681 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., 1849600 + 549081 = 1360^2 + 741^2 .

It is a cyclic number.

It is not a de Polignac number, because 2398681 - 2¹ = 2398679 is a prime.

It is a super-2 number, since 2×2398681² = 11507341079522, which contains 22 as substring.

Together with 2398679, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2398681.

It is not a weakly prime, because it can be changed into another prime (2398661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1199340 + 1199341.

It is an arithmetic number, because the mean of its divisors is an integer number (1199341).

2^2398681 is an apocalyptic number.

It is an amenable number.

2398681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2398681 is an equidigital number, since it uses as much as digits as its factorization.

2398681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 37.

The square root of 2398681 is about 1548.7675745573. The cubic root of 2398681 is about 133.8620582423.

The spelling of 2398681 in words is "two million, three hundred ninety-eight thousand, six hundred eighty-one".