649312407 has 12 divisors (see below), whose sum is σ = 970237320. Its totient is φ = 417948048.

The previous prime is 649312397. The next prime is 649312421. The reversal of 649312407 is 704213946.

649312407 is a `hidden beast` number, since 649 + 3 + 1 + 2 + 4 + 0 + 7 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-649312407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649312007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1243633 + ... + 1244154.

It is an arithmetic number, because the mean of its divisors is an integer number (80853110).

Almost surely, 2^649312407 is an apocalyptic number.

649312407 is a deficient number, since it is larger than the sum of its proper divisors (320924913).

649312407 is a wasteful number, since it uses less digits than its factorization.

649312407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2487822 (or 2487819 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 649312407 is about 25481.6091917288. The cubic root of 649312407 is about 865.9335514479.

The spelling of 649312407 in words is "six hundred forty-nine million, three hundred twelve thousand, four hundred seven".