650399731 has 2 divisors, whose sum is σ = 650399732. Its totient is φ = 650399730.

The previous prime is 650399699. The next prime is 650399741. The reversal of 650399731 is 137993056.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 650399731 - 2⁵ = 650399699 is a prime.

It is a super-2 number, since 2×650399731² = 846039620169744722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (650399741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325199865 + 325199866.

It is an arithmetic number, because the mean of its divisors is an integer number (325199866).

Almost surely, 2^650399731 is an apocalyptic number.

650399731 is a deficient number, since it is larger than the sum of its proper divisors (1).

650399731 is an equidigital number, since it uses as much as digits as its factorization.

650399731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 153090, while the sum is 43.

The square root of 650399731 is about 25502.9357329700. The cubic root of 650399731 is about 866.4166395294.

The spelling of 650399731 in words is "six hundred fifty million, three hundred ninety-nine thousand, seven hundred thirty-one".