649335619 has 4 divisors (see below), whose sum is σ = 649763496. Its totient is φ = 648907744.

The previous prime is 649335611. The next prime is 649335653. The reversal of 649335619 is 916533946.

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

It is a cyclic number.

It is not a de Polignac number, because 649335619 - 2³ = 649335611 is a prime.

It is a super-2 number, since 2×649335619² = 843273492204226322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649335611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211654 + ... + 214699.

It is an arithmetic number, because the mean of its divisors is an integer number (162440874).

Almost surely, 2^649335619 is an apocalyptic number.

649335619 is a deficient number, since it is larger than the sum of its proper divisors (427877).

649335619 is a wasteful number, since it uses less digits than its factorization.

649335619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427876.

The product of its digits is 524880, while the sum is 46.

The square root of 649335619 is about 25482.0646533989. The cubic root of 649335619 is about 865.9438699581.

The spelling of 649335619 in words is "six hundred forty-nine million, three hundred thirty-five thousand, six hundred nineteen".