2398659981 has 8 divisors (see below), whose sum is σ = 3228103584. Its totient is φ = 1584161520.

The previous prime is 2398659947. The next prime is 2398660001. The reversal of 2398659981 is 1899568932.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2398659981 - 2⁷ = 2398659853 is a prime.

It is a super-2 number, since 2×2398659981² = 11507139408901840722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2398652981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3735910 + ... + 3736551.

It is an arithmetic number, because the mean of its divisors is an integer number (403512948).

Almost surely, 2^2398659981 is an apocalyptic number.

It is an amenable number.

2398659981 is a deficient number, since it is larger than the sum of its proper divisors (829443603).

2398659981 is a wasteful number, since it uses less digits than its factorization.

2398659981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7472571.

The product of its digits is 8398080, while the sum is 60.

The square root of 2398659981 is about 48976.1164344418. The cubic root of 2398659981 is about 1338.6166724204.

The spelling of 2398659981 in words is "two billion, three hundred ninety-eight million, six hundred fifty-nine thousand, nine hundred eighty-one".