650139999 has 4 divisors (see below), whose sum is σ = 866853336. Its totient is φ = 433426664.

The previous prime is 650139977. The next prime is 650140021. The reversal of 650139999 is 999931056.

650139999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (650139977) and next prime (650140021).

It is a cyclic number.

It is not a de Polignac number, because 650139999 - 2¹¹ = 650137951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (650139199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108356664 + ... + 108356669.

It is an arithmetic number, because the mean of its divisors is an integer number (216713334).

Almost surely, 2^650139999 is an apocalyptic number.

650139999 is a deficient number, since it is larger than the sum of its proper divisors (216713337).

650139999 is a wasteful number, since it uses less digits than its factorization.

650139999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216713336.

The product of its (nonzero) digits is 590490, while the sum is 51.

The square root of 650139999 is about 25497.8430264209. The cubic root of 650139999 is about 866.3012919578.

The spelling of 650139999 in words is "six hundred fifty million, one hundred thirty-nine thousand, nine hundred ninety-nine".