650081 has 2 divisors, whose sum is σ = 650082. Its totient is φ = 650080.

The previous prime is 650071. The next prime is 650099. The reversal of 650081 is 180056.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 616225 + 33856 = 785^2 + 184^2 .

It is a cyclic number.

It is not a de Polignac number, because 650081 - 2⁶ = 650017 is a prime.

It is a super-2 number, since 2×650081² = 845210613122, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 650081.

It is not a weakly prime, because it can be changed into another prime (650011) 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 as a sum of consecutive naturals, namely, 325040 + 325041.

It is an arithmetic number, because the mean of its divisors is an integer number (325041).

2⁶⁵⁰⁰⁸¹ is an apocalyptic number.

It is an amenable number.

650081 is a deficient number, since it is larger than the sum of its proper divisors (1).

650081 is an equidigital number, since it uses as much as digits as its factorization.

650081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 650081 is about 806.2760073325. The cubic root of 650081 is about 86.6275086086.

The spelling of 650081 in words is "six hundred fifty thousand, eighty-one".