649351 has 4 divisors (see below), whose sum is σ = 654592. Its totient is φ = 644112.

The previous prime is 649321. The next prime is 649361. The reversal of 649351 is 153946.

649351 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 649351 - 2¹¹ = 647303 is a prime.

It is a Duffinian number.

649351 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2430 + ... + 2683.

It is an arithmetic number, because the mean of its divisors is an integer number (163648).

2⁶⁴⁹³⁵¹ is an apocalyptic number.

649351 is a deficient number, since it is larger than the sum of its proper divisors (5241).

649351 is a wasteful number, since it uses less digits than its factorization.

649351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5240.

The product of its digits is 3240, while the sum is 28.

The square root of 649351 is about 805.8231815976. The cubic root of 649351 is about 86.5950707192.

It can be divided in two parts, 649 and 351, that added together give a cube (1000 = 10³).

The spelling of 649351 in words is "six hundred forty-nine thousand, three hundred fifty-one".