9923768249 has 4 divisors (see below), whose sum is σ = 9936005520. Its totient is φ = 9911530980.

The previous prime is 9923768227. The next prime is 9923768273. The reversal of 9923768249 is 9428673299.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9428673299 = 13099 ⋅719801.

It is a cyclic number.

It is not a de Polignac number, because 9923768249 - 2⁸ = 9923767993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9923768219) 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, 6117419 + ... + 6119040.

It is an arithmetic number, because the mean of its divisors is an integer number (2484001380).

Almost surely, 2^9923768249 is an apocalyptic number.

It is an amenable number.

9923768249 is a deficient number, since it is larger than the sum of its proper divisors (12237271).

9923768249 is a wasteful number, since it uses less digits than its factorization.

9923768249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12237270.

The product of its digits is 11757312, while the sum is 59.

The square root of 9923768249 is about 99618.1120529796. The cubic root of 9923768249 is about 2148.9461753846.

The spelling of 9923768249 in words is "nine billion, nine hundred twenty-three million, seven hundred sixty-eight thousand, two hundred forty-nine".