649962263 has 4 divisors (see below), whose sum is σ = 650242248. Its totient is φ = 649682280.

The previous prime is 649962253. The next prime is 649962301. The reversal of 649962263 is 362269946.

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

It is a cyclic number.

It is not a de Polignac number, because 649962263 - 2⁶ = 649962199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649962233) by changing a digit.

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, 136481 + ... + 141162.

It is an arithmetic number, because the mean of its divisors is an integer number (162560562).

Almost surely, 2^649962263 is an apocalyptic number.

649962263 is a deficient number, since it is larger than the sum of its proper divisors (279985).

649962263 is a wasteful number, since it uses less digits than its factorization.

649962263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279984.

The product of its digits is 839808, while the sum is 47.

The square root of 649962263 is about 25494.3574737627. The cubic root of 649962263 is about 866.2223412908. Note that the first 3 decimals are identical.

The spelling of 649962263 in words is "six hundred forty-nine million, nine hundred sixty-two thousand, two hundred sixty-three".