649243 has 8 divisors (see below), whose sum is σ = 748512. Its totient is φ = 551616.

The previous prime is 649217. The next prime is 649261. The reversal of 649243 is 342946.

649243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 649243 - 2⁹ = 648731 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649273) 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, 621 + ... + 1297.

It is an arithmetic number, because the mean of its divisors is an integer number (93564).

2⁶⁴⁹²⁴³ is an apocalyptic number.

649243 is a deficient number, since it is larger than the sum of its proper divisors (99269).

649243 is a wasteful number, since it uses less digits than its factorization.

649243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821.

The product of its digits is 5184, while the sum is 28.

The square root of 649243 is about 805.7561665914. The cubic root of 649243 is about 86.5902696248.

The spelling of 649243 in words is "six hundred forty-nine thousand, two hundred forty-three".