649682547 has 8 divisors (see below), whose sum is σ = 866770944. Its totient is φ = 432857928.

The previous prime is 649682471. The next prime is 649682573. The reversal of 649682547 is 745286946.

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

It is not a de Polignac number, because 649682547 - 2⁸ = 649682291 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 649682547.

It is not an unprimeable number, because it can be changed into a prime (649682647) 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, 60123 + ... + 70100.

It is an arithmetic number, because the mean of its divisors is an integer number (108346368).

Almost surely, 2^649682547 is an apocalyptic number.

649682547 is a deficient number, since it is larger than the sum of its proper divisors (217088397).

649682547 is a wasteful number, since it uses less digits than its factorization.

649682547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131889.

The product of its digits is 2903040, while the sum is 51.

The square root of 649682547 is about 25488.8710420842. The cubic root of 649682547 is about 866.0980617602.

The spelling of 649682547 in words is "six hundred forty-nine million, six hundred eighty-two thousand, five hundred forty-seven".