8454978249 has 4 divisors (see below), whose sum is σ = 11273304336. Its totient is φ = 5636652164.

The previous prime is 8454978241. The next prime is 8454978253. The reversal of 8454978249 is 9428794548.

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.

It is a cyclic number.

It is not a de Polignac number, because 8454978249 - 2³ = 8454978241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8454978192 and 8454978201.

It is not an unprimeable number, because it can be changed into a prime (8454978241) 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, 1409163039 + ... + 1409163044.

It is an arithmetic number, because the mean of its divisors is an integer number (2818326084).

Almost surely, 2^8454978249 is an apocalyptic number.

It is an amenable number.

8454978249 is a deficient number, since it is larger than the sum of its proper divisors (2818326087).

8454978249 is a wasteful number, since it uses less digits than its factorization.

8454978249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2818326086.

The product of its digits is 23224320, while the sum is 60.

The square root of 8454978249 is about 91950.9556720320. The cubic root of 8454978249 is about 2037.2179693388.

The spelling of 8454978249 in words is "eight billion, four hundred fifty-four million, nine hundred seventy-eight thousand, two hundred forty-nine".