649149 has 8 divisors (see below), whose sum is σ = 871872. Its totient is φ = 429600.

The previous prime is 649147. The next prime is 649151. The reversal of 649149 is 941946.

It is an interprime number because it is at equal distance from previous prime (649147) and next prime (649151).

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

It is not a de Polignac number, because 649149 - 2¹ = 649147 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649141) 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, 264 + ... + 1169.

It is an arithmetic number, because the mean of its divisors is an integer number (108984).

2⁶⁴⁹¹⁴⁹ is an apocalyptic number.

It is an amenable number.

649149 is a deficient number, since it is larger than the sum of its proper divisors (222723).

649149 is a wasteful number, since it uses less digits than its factorization.

649149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1587.

The product of its digits is 7776, while the sum is 33.

The square root of 649149 is about 805.6978341785. The cubic root of 649149 is about 86.5860904612.

The spelling of 649149 in words is "six hundred forty-nine thousand, one hundred forty-nine".