649955 has 8 divisors (see below), whose sum is σ = 793104. Its totient is φ = 511200.

The previous prime is 649937. The next prime is 649969. The reversal of 649955 is 559946.

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

It is not a de Polignac number, because 649955 - 2¹⁰ = 648931 is a prime.

It is a Duffinian 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, 761 + ... + 1370.

It is an arithmetic number, because the mean of its divisors is an integer number (99138).

2⁶⁴⁹⁹⁵⁵ is an apocalyptic number.

649955 is a deficient number, since it is larger than the sum of its proper divisors (143149).

649955 is a wasteful number, since it uses less digits than its factorization.

649955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2197.

The product of its digits is 48600, while the sum is 38.

The square root of 649955 is about 806.1978665315. The cubic root of 649955 is about 86.6219114746.

Subtracting from 649955 its reverse (559946), we obtain a palindrome (90009).

The spelling of 649955 in words is "six hundred forty-nine thousand, nine hundred fifty-five".