1649382447 has 4 divisors (see below), whose sum is σ = 2199176600. Its totient is φ = 1099588296.

The previous prime is 1649382437. The next prime is 1649382467. The reversal of 1649382447 is 7442839461.

1649382447 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1649382447 - 2⁴ = 1649382431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1649382396 and 1649382405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1649382407) 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, 274897072 + ... + 274897077.

It is an arithmetic number, because the mean of its divisors is an integer number (549794150).

Almost surely, 2^1649382447 is an apocalyptic number.

1649382447 is a deficient number, since it is larger than the sum of its proper divisors (549794153).

1649382447 is an equidigital number, since it uses as much as digits as its factorization.

1649382447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549794152.

The product of its digits is 1161216, while the sum is 48.

The square root of 1649382447 is about 40612.5897598269. The cubic root of 1649382447 is about 1181.5183096010.

The spelling of 1649382447 in words is "one billion, six hundred forty-nine million, three hundred eighty-two thousand, four hundred forty-seven".