649774 has 16 divisors (see below), whose sum is σ = 1069200. Its totient is φ = 294784.

The previous prime is 649771. The next prime is 649777. The reversal of 649774 is 477946.

It is an interprime number because it is at equal distance from previous prime (649771) and next prime (649777).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 657 + ... + 1315.

It is an arithmetic number, because the mean of its divisors is an integer number (66825).

2⁶⁴⁹⁷⁷⁴ is an apocalyptic number.

649774 is a deficient number, since it is larger than the sum of its proper divisors (419426).

649774 is a wasteful number, since it uses less digits than its factorization.

649774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707.

The product of its digits is 42336, while the sum is 37.

The square root of 649774 is about 806.0856033946. The cubic root of 649774 is about 86.6138698812.

The spelling of 649774 in words is "six hundred forty-nine thousand, seven hundred seventy-four".