649086523 has 16 divisors (see below), whose sum is σ = 677160000. Its totient is φ = 621637632.

The previous prime is 649086521. The next prime is 649086527. The reversal of 649086523 is 325680946.

It is a cyclic number.

It is not a de Polignac number, because 649086523 - 2¹ = 649086521 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 649086523.

It is not an unprimeable number, because it can be changed into a prime (649086521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1445403 + ... + 1445851.

It is an arithmetic number, because the mean of its divisors is an integer number (42322500).

Almost surely, 2^649086523 is an apocalyptic number.

649086523 is a deficient number, since it is larger than the sum of its proper divisors (28073477).

649086523 is a wasteful number, since it uses less digits than its factorization.

649086523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014.

The product of its (nonzero) digits is 311040, while the sum is 43.

The square root of 649086523 is about 25477.1765115368. The cubic root of 649086523 is about 865.8331256136.

The spelling of 649086523 in words is "six hundred forty-nine million, eighty-six thousand, five hundred twenty-three".