649187846 has 4 divisors (see below), whose sum is σ = 973781772. Its totient is φ = 324593922.

The previous prime is 649187843. The next prime is 649187879. The reversal of 649187846 is 648781946.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 648781946 = 2 ⋅324390973.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649187843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162296960 + ... + 162296963.

It is an arithmetic number, because the mean of its divisors is an integer number (243445443).

Almost surely, 2^649187846 is an apocalyptic number.

649187846 is a deficient number, since it is larger than the sum of its proper divisors (324593926).

649187846 is a wasteful number, since it uses less digits than its factorization.

649187846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324593925.

The product of its digits is 2322432, while the sum is 53.

The square root of 649187846 is about 25479.1649392204. The cubic root of 649187846 is about 865.8781757172.

The spelling of 649187846 in words is "six hundred forty-nine million, one hundred eighty-seven thousand, eight hundred forty-six".