650546381 has 2 divisors, whose sum is σ = 650546382. Its totient is φ = 650546380.

The previous prime is 650546363. The next prime is 650546389. The reversal of 650546381 is 183645056.

650546381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 479172100 + 171374281 = 21890^2 + 13091^2 .

It is a cyclic number.

It is not a de Polignac number, because 650546381 - 2¹⁸ = 650284237 is a prime.

It is a super-2 number, since 2×650546381² = 846421187664394322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (650546389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325273190 + 325273191.

It is an arithmetic number, because the mean of its divisors is an integer number (325273191).

Almost surely, 2^650546381 is an apocalyptic number.

It is an amenable number.

650546381 is a deficient number, since it is larger than the sum of its proper divisors (1).

650546381 is an equidigital number, since it uses as much as digits as its factorization.

650546381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 650546381 is about 25505.8107301062. The cubic root of 650546381 is about 866.4817535640.

The spelling of 650546381 in words is "six hundred fifty million, five hundred forty-six thousand, three hundred eighty-one".