649244717 has 16 divisors (see below), whose sum is σ = 729437184. Its totient is φ = 572736000.

The previous prime is 649244677. The next prime is 649244737. The reversal of 649244717 is 717442946.

It is a cyclic number.

It is not a de Polignac number, because 649244717 - 2⁸ = 649244461 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 (649244737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82373 + ... + 89909.

It is an arithmetic number, because the mean of its divisors is an integer number (45589824).

Almost surely, 2^649244717 is an apocalyptic number.

It is an amenable number.

649244717 is a deficient number, since it is larger than the sum of its proper divisors (80192467).

649244717 is a wasteful number, since it uses less digits than its factorization.

649244717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7780.

The product of its digits is 338688, while the sum is 44.

The square root of 649244717 is about 25480.2809442910. The cubic root of 649244717 is about 865.9034595751.

The spelling of 649244717 in words is "six hundred forty-nine million, two hundred forty-four thousand, seven hundred seventeen".