8008449749 has 4 divisors (see below), whose sum is σ = 8035782636. Its totient is φ = 7981116864.

The previous prime is 8008449739. The next prime is 8008449773. The reversal of 8008449749 is 9479448008.

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 5976063025 + 2032386724 = 77305^2 + 45082^2 .

It is a cyclic number.

It is not a de Polignac number, because 8008449749 - 2⁴ = 8008449733 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8008449749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8008449739) 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, 13666004 + ... + 13666589.

It is an arithmetic number, because the mean of its divisors is an integer number (2008945659).

Almost surely, 2^8008449749 is an apocalyptic number.

It is an amenable number.

8008449749 is a deficient number, since it is larger than the sum of its proper divisors (27332887).

8008449749 is a wasteful number, since it uses less digits than its factorization.

8008449749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27332886.

The product of its (nonzero) digits is 2322432, while the sum is 53.

The square root of 8008449749 is about 89489.9421667039. The cubic root of 8008449749 is about 2000.7038979848.

The spelling of 8008449749 in words is "eight billion, eight million, four hundred forty-nine thousand, seven hundred forty-nine".