649291317 has 8 divisors (see below), whose sum is σ = 870726624. Its totient is φ = 430358448.

The previous prime is 649291277. The next prime is 649291337. The reversal of 649291317 is 713192946.

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

It is not a de Polignac number, because 649291317 - 2¹⁶ = 649225781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649291337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 625003 + ... + 626040.

It is an arithmetic number, because the mean of its divisors is an integer number (108840828).

Almost surely, 2^649291317 is an apocalyptic number.

It is an amenable number.

649291317 is a deficient number, since it is larger than the sum of its proper divisors (221435307).

649291317 is a wasteful number, since it uses less digits than its factorization.

649291317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251219.

The product of its digits is 81648, while the sum is 42.

The square root of 649291317 is about 25481.1953605007. The cubic root of 649291317 is about 865.9241760245.

The spelling of 649291317 in words is "six hundred forty-nine million, two hundred ninety-one thousand, three hundred seventeen".