650129801 has 8 divisors (see below), whose sum is σ = 677461320. Its totient is φ = 623125888.

The previous prime is 650129797. The next prime is 650129807. The reversal of 650129801 is 108921056.

It can be written as a sum of positive squares in 4 ways, for example, as 170563600 + 479566201 = 13060^2 + 21899^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 650129801 - 2² = 650129797 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (650129807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77846 + ... + 85791.

It is an arithmetic number, because the mean of its divisors is an integer number (84682665).

Almost surely, 2^650129801 is an apocalyptic number.

It is an amenable number.

650129801 is a deficient number, since it is larger than the sum of its proper divisors (27331519).

650129801 is a wasteful number, since it uses less digits than its factorization.

650129801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163803.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 650129801 is about 25497.6430479368. The cubic root of 650129801 is about 866.2967623760.

The spelling of 650129801 in words is "six hundred fifty million, one hundred twenty-nine thousand, eight hundred one".