7868437249 has 4 divisors (see below), whose sum is σ = 7911909460. Its totient is φ = 7824965040.

The previous prime is 7868437243. The next prime is 7868437253. The reversal of 7868437249 is 9427348687.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1075380849 + 6793056400 = 32793^2 + 82420^2 .

It is a cyclic number.

It is not a de Polignac number, because 7868437249 - 2⁵ = 7868437217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7868437193 and 7868437202.

It is not an unprimeable number, because it can be changed into a prime (7868437243) 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, 21735834 + ... + 21736195.

It is an arithmetic number, because the mean of its divisors is an integer number (1977977365).

Almost surely, 2^7868437249 is an apocalyptic number.

It is an amenable number.

7868437249 is a deficient number, since it is larger than the sum of its proper divisors (43472211).

7868437249 is a wasteful number, since it uses less digits than its factorization.

7868437249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43472210.

The product of its digits is 16257024, while the sum is 58.

The square root of 7868437249 is about 88704.2121265952. The cubic root of 7868437249 is about 1988.9757823805.

The spelling of 7868437249 in words is "seven billion, eight hundred sixty-eight million, four hundred thirty-seven thousand, two hundred forty-nine".