649958285 has 4 divisors (see below), whose sum is σ = 779949948. Its totient is φ = 519966624.

The previous prime is 649958279. The next prime is 649958303. The reversal of 649958285 is 582859946.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 76930441 + 573027844 = 8771^2 + 23938^2 .

It is a cyclic number.

It is not a de Polignac number, because 649958285 - 2²⁴ = 633181069 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 649958285.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64995824 + ... + 64995833.

It is an arithmetic number, because the mean of its divisors is an integer number (194987487).

Almost surely, 2^649958285 is an apocalyptic number.

It is an amenable number.

649958285 is a deficient number, since it is larger than the sum of its proper divisors (129991663).

649958285 is a wasteful number, since it uses less digits than its factorization.

649958285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129991662.

The product of its digits is 6220800, while the sum is 56.

The square root of 649958285 is about 25494.2794563800. The cubic root of 649958285 is about 866.2205740910.

The spelling of 649958285 in words is "six hundred forty-nine million, nine hundred fifty-eight thousand, two hundred eighty-five".