649684725 has 24 divisors (see below), whose sum is σ = 1075651392. Its totient is φ = 346012800.

The previous prime is 649684723. The next prime is 649684747. The reversal of 649684725 is 527486946.

It is not a de Polignac number, because 649684725 - 2¹ = 649684723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649684723) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51384 + ... + 62766.

It is an arithmetic number, because the mean of its divisors is an integer number (44818808).

Almost surely, 2^649684725 is an apocalyptic number.

It is an amenable number.

649684725 is a deficient number, since it is larger than the sum of its proper divisors (425966667).

649684725 is a wasteful number, since it uses less digits than its factorization.

649684725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12157 (or 12152 counting only the distinct ones).

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

The square root of 649684725 is about 25488.9137665770. The cubic root of 649684725 is about 866.0990295968.

The spelling of 649684725 in words is "six hundred forty-nine million, six hundred eighty-four thousand, seven hundred twenty-five".