649519 has 8 divisors (see below), whose sum is σ = 740880. Its totient is φ = 564096.

The previous prime is 649511. The next prime is 649529. The reversal of 649519 is 915946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 649519 - 2³ = 649511 is a prime.

It is a super-2 number, since 2×649519² = 843749862722, which contains 22 as substring.

It is a Duffinian number.

649519 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1249 + ... + 1690.

It is an arithmetic number, because the mean of its divisors is an integer number (92610).

2⁶⁴⁹⁵¹⁹ is an apocalyptic number.

649519 is a deficient number, since it is larger than the sum of its proper divisors (91361).

649519 is a wasteful number, since it uses less digits than its factorization.

649519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2969.

The product of its digits is 9720, while the sum is 34.

The square root of 649519 is about 805.9274160866. The cubic root of 649519 is about 86.6025380301.

The spelling of 649519 in words is "six hundred forty-nine thousand, five hundred nineteen".