649608471 has 32 divisors (see below), whose sum is σ = 1024413120. Its totient is φ = 405430272.

The previous prime is 649608451. The next prime is 649608529. The reversal of 649608471 is 174806946.

It is not a de Polignac number, because 649608471 - 2¹¹ = 649606423 is a prime.

It is a super-3 number, since 3×649608471³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649608451) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84921 + ... + 92253.

It is an arithmetic number, because the mean of its divisors is an integer number (32012910).

Almost surely, 2^649608471 is an apocalyptic number.

649608471 is a deficient number, since it is larger than the sum of its proper divisors (374804649).

649608471 is a wasteful number, since it uses less digits than its factorization.

649608471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7552 (or 7546 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 649608471 is about 25487.4178958952. The cubic root of 649608471 is about 866.0651433661.

The spelling of 649608471 in words is "six hundred forty-nine million, six hundred eight thousand, four hundred seventy-one".