1649606313 has 4 divisors (see below), whose sum is σ = 2199475088. Its totient is φ = 1099737540.

The previous prime is 1649606297. The next prime is 1649606323. The reversal of 1649606313 is 3136069461.

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 not a de Polignac number, because 1649606313 - 2⁴ = 1649606297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1649606323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 274934383 + ... + 274934388.

It is an arithmetic number, because the mean of its divisors is an integer number (549868772).

Almost surely, 2^1649606313 is an apocalyptic number.

It is an amenable number.

1649606313 is a deficient number, since it is larger than the sum of its proper divisors (549868775).

1649606313 is an equidigital number, since it uses as much as digits as its factorization.

1649606313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549868774.

The product of its (nonzero) digits is 69984, while the sum is 39.

The square root of 1649606313 is about 40615.3457821056. The cubic root of 1649606313 is about 1181.5717618921.

The spelling of 1649606313 in words is "one billion, six hundred forty-nine million, six hundred six thousand, three hundred thirteen".