658438649 has 8 divisors (see below), whose sum is σ = 743065920. Its totient is φ = 577939600.

The previous prime is 658438633. The next prime is 658438699. The reversal of 658438649 is 946834856.

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

It is a cyclic number.

It is not a de Polignac number, because 658438649 - 2⁴ = 658438633 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 658438649.

It is not an unprimeable number, because it can be changed into a prime (658438609) 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, 1031717 + ... + 1032354.

It is an arithmetic number, because the mean of its divisors is an integer number (92883240).

Almost surely, 2^658438649 is an apocalyptic number.

It is an amenable number.

658438649 is a deficient number, since it is larger than the sum of its proper divisors (84627271).

658438649 is a wasteful number, since it uses less digits than its factorization.

658438649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2064111.

The product of its digits is 4976640, while the sum is 53.

The square root of 658438649 is about 25660.0594114667. The cubic root of 658438649 is about 869.9716593578.

The spelling of 658438649 in words is "six hundred fifty-eight million, four hundred thirty-eight thousand, six hundred forty-nine".