650143381 has 2 divisors, whose sum is σ = 650143382. Its totient is φ = 650143380.

The previous prime is 650143357. The next prime is 650143423. The reversal of 650143381 is 183341056.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 434347281 + 215796100 = 20841^2 + 14690^2 .

It is a cyclic number.

It is not a de Polignac number, because 650143381 - 2¹¹ = 650141333 is a prime.

It is a super-2 number, since 2×650143381² = 845372831716222322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (650143301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325071690 + 325071691.

It is an arithmetic number, because the mean of its divisors is an integer number (325071691).

Almost surely, 2^650143381 is an apocalyptic number.

It is an amenable number.

650143381 is a deficient number, since it is larger than the sum of its proper divisors (1).

650143381 is an equidigital number, since it uses as much as digits as its factorization.

650143381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 650143381 is about 25497.9093456699. The cubic root of 650143381 is about 866.3027941090.

The spelling of 650143381 in words is "six hundred fifty million, one hundred forty-three thousand, three hundred eighty-one".