649104986 has 16 divisors (see below), whose sum is σ = 1012029984. Its totient is φ = 311973264.

The previous prime is 649104983. The next prime is 649104991. The reversal of 649104986 is 689401946.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 649104986.

It is not an unprimeable number, because it can be changed into a prime (649104983) 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, 46700 + ... + 58983.

It is an arithmetic number, because the mean of its divisors is an integer number (63251874).

Almost surely, 2^649104986 is an apocalyptic number.

649104986 is a deficient number, since it is larger than the sum of its proper divisors (362924998).

649104986 is a wasteful number, since it uses less digits than its factorization.

649104986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105805.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 649104986 is about 25477.5388528798. The cubic root of 649104986 is about 865.8413349585.

It can be divided in two parts, 64910 and 4986, that added together give a palindrome (69896).

The spelling of 649104986 in words is "six hundred forty-nine million, one hundred four thousand, nine hundred eighty-six".