649727329 has 4 divisors (see below), whose sum is σ = 650176560. Its totient is φ = 649278100.

The previous prime is 649727317. The next prime is 649727383. The reversal of 649727329 is 923727946.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 649727329 - 2⁵ = 649727297 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649727929) 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, 222439 + ... + 225340.

It is an arithmetic number, because the mean of its divisors is an integer number (162544140).

Almost surely, 2^649727329 is an apocalyptic number.

It is an amenable number.

649727329 is a deficient number, since it is larger than the sum of its proper divisors (449231).

649727329 is a wasteful number, since it uses less digits than its factorization.

649727329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449230.

The product of its digits is 1143072, while the sum is 49.

The square root of 649727329 is about 25489.7494887651. The cubic root of 649727329 is about 866.1179610749.

It can be divided in two parts, 649727 and 329, that added together give a palindrome (650056).

The spelling of 649727329 in words is "six hundred forty-nine million, seven hundred twenty-seven thousand, three hundred twenty-nine".