650651939 has 6 divisors (see below), whose sum is σ = 756880884. Its totient is φ = 557701620.

The previous prime is 650651929. The next prime is 650651957. The reversal of 650651939 is 939156056.

It is not a de Polignac number, because 650651939 - 2⁴ = 650651923 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 650651939.

It is not an unprimeable number, because it can be changed into a prime (650651929) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6639257 + ... + 6639354.

It is an arithmetic number, because the mean of its divisors is an integer number (126146814).

Almost surely, 2^650651939 is an apocalyptic number.

650651939 is a deficient number, since it is larger than the sum of its proper divisors (106228945).

650651939 is a wasteful number, since it uses less digits than its factorization.

650651939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13278625 (or 13278618 counting only the distinct ones).

The product of its (nonzero) digits is 218700, while the sum is 44.

The square root of 650651939 is about 25507.8799393442. The cubic root of 650651939 is about 866.5286162920.

The spelling of 650651939 in words is "six hundred fifty million, six hundred fifty-one thousand, nine hundred thirty-nine".