650019943 has 2 divisors, whose sum is σ = 650019944. Its totient is φ = 650019942.

The previous prime is 650019913. The next prime is 650019961. The reversal of 650019943 is 349910056.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 650019943 - 2¹⁷ = 649888871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (650019913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325009971 + 325009972.

It is an arithmetic number, because the mean of its divisors is an integer number (325009972).

Almost surely, 2^650019943 is an apocalyptic number.

650019943 is a deficient number, since it is larger than the sum of its proper divisors (1).

650019943 is an equidigital number, since it uses as much as digits as its factorization.

650019943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 650019943 is about 25495.4886793723. The cubic root of 650019943 is about 866.2479644331.

Adding to 650019943 its reverse (349910056), we get a palindrome (999929999).

The spelling of 650019943 in words is "six hundred fifty million, nineteen thousand, nine hundred forty-three".