649345 has 8 divisors (see below), whose sum is σ = 792360. Its totient is φ = 510720.

The previous prime is 649321. The next prime is 649361. The reversal of 649345 is 543946.

It can be written as a sum of positive squares in 4 ways, for example, as 7744 + 641601 = 88^2 + 801^2 .

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

It is not a de Polignac number, because 649345 - 2⁷ = 649217 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 760 + ... + 1369.

It is an arithmetic number, because the mean of its divisors is an integer number (99045).

2⁶⁴⁹³⁴⁵ is an apocalyptic number.

It is an amenable number.

649345 is a deficient number, since it is larger than the sum of its proper divisors (143015).

649345 is a wasteful number, since it uses less digits than its factorization.

649345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2195.

The product of its digits is 12960, while the sum is 31.

The square root of 649345 is about 805.8194586879. The cubic root of 649345 is about 86.5948040057.

It can be divided in two parts, 64 and 9345, that added together give a square (9409 = 97²).

The spelling of 649345 in words is "six hundred forty-nine thousand, three hundred forty-five".