2398989923 has 6 divisors (see below), whose sum is σ = 2636906412. Its totient is φ = 2180899820.

The previous prime is 2398989899. The next prime is 2398989937. The reversal of 2398989923 is 3299898932.

It is a happy number.

It is not a de Polignac number, because 2398989923 - 2⁸ = 2398989667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2398982923) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9913061 + ... + 9913302.

It is an arithmetic number, because the mean of its divisors is an integer number (439484402).

Almost surely, 2^2398989923 is an apocalyptic number.

2398989923 is a deficient number, since it is larger than the sum of its proper divisors (237916489).

2398989923 is a wasteful number, since it uses less digits than its factorization.

2398989923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19826385 (or 19826374 counting only the distinct ones).

The product of its digits is 15116544, while the sum is 62.

The square root of 2398989923 is about 48979.4847155419. The cubic root of 2398989923 is about 1338.6780463565.

Subtracting 2398989923 from its reverse (3299898932), we obtain a palindrome (900909009).

The spelling of 2398989923 in words is "two billion, three hundred ninety-eight million, nine hundred eighty-nine thousand, nine hundred twenty-three".