649305933 has 8 divisors (see below), whose sum is σ = 889139808. Its totient is φ = 421171344.

The previous prime is 649305907. The next prime is 649305947. The reversal of 649305933 is 339503946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 649305933 - 2⁹ = 649305421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649305983) 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, 2924691 + ... + 2924912.

It is an arithmetic number, because the mean of its divisors is an integer number (111142476).

Almost surely, 2^649305933 is an apocalyptic number.

It is an amenable number.

649305933 is a deficient number, since it is larger than the sum of its proper divisors (239833875).

649305933 is a wasteful number, since it uses less digits than its factorization.

649305933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5849643.

The product of its (nonzero) digits is 262440, while the sum is 42.

The square root of 649305933 is about 25481.4821586186. The cubic root of 649305933 is about 865.9306734946.

The spelling of 649305933 in words is "six hundred forty-nine million, three hundred five thousand, nine hundred thirty-three".