649036917 has 12 divisors (see below), whose sum is σ = 937853644. Its totient is φ = 432527040.

The previous prime is 649036891. The next prime is 649036919. The reversal of 649036917 is 719630946.

It can be written as a sum of positive squares in 2 ways, for example, as 187388721 + 461648196 = 13689^2 + 21486^2 .

It is not a de Polignac number, because 649036917 - 2⁶ = 649036853 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 (649036919) 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, 14367 + ... + 38787.

Almost surely, 2^649036917 is an apocalyptic number.

It is an amenable number.

649036917 is a deficient number, since it is larger than the sum of its proper divisors (288816727).

649036917 is a wasteful number, since it uses less digits than its factorization.

649036917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27380 (or 27377 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 649036917 is about 25476.2029549146. The cubic root of 649036917 is about 865.8110681473.

The spelling of 649036917 in words is "six hundred forty-nine million, thirty-six thousand, nine hundred seventeen".