649129 has 12 divisors (see below), whose sum is σ = 737856. Its totient is φ = 569712.

The previous prime is 649123. The next prime is 649141. The reversal of 649129 is 921946.

It is a happy number.

It is not a de Polignac number, because 649129 - 2⁷ = 649001 is a prime.

It is a Duffinian number.

Its product of digits (3888) is a multiple of the sum of its prime factors (216).

It is a self number, because there is not a number n which added to its sum of digits gives 649129.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3804 + ... + 3970.

It is an arithmetic number, because the mean of its divisors is an integer number (61488).

2⁶⁴⁹¹²⁹ is an apocalyptic number.

It is an amenable number.

649129 is a deficient number, since it is larger than the sum of its proper divisors (88727).

649129 is a wasteful number, since it uses less digits than its factorization.

649129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216 (or 203 counting only the distinct ones).

The product of its digits is 3888, while the sum is 31.

The square root of 649129 is about 805.6854224820. The cubic root of 649129 is about 86.5852012254.

The spelling of 649129 in words is "six hundred forty-nine thousand, one hundred twenty-nine".