649493111 has 8 divisors (see below), whose sum is σ = 662410224. Its totient is φ = 636600640.

The previous prime is 649493101. The next prime is 649493149. The reversal of 649493111 is 111394946.

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

It is a cyclic number.

It is not a de Polignac number, because 649493111 - 2²⁶ = 582384247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649493101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52556 + ... + 63726.

It is an arithmetic number, because the mean of its divisors is an integer number (82801278).

Almost surely, 2^649493111 is an apocalyptic number.

649493111 is a deficient number, since it is larger than the sum of its proper divisors (12917113).

649493111 is a wasteful number, since it uses less digits than its factorization.

649493111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12321.

The product of its digits is 23328, while the sum is 38.

The square root of 649493111 is about 25485.1547179922. The cubic root of 649493111 is about 866.0138739250.

The spelling of 649493111 in words is "six hundred forty-nine million, four hundred ninety-three thousand, one hundred eleven".