650662993 has 2 divisors, whose sum is σ = 650662994. Its totient is φ = 650662992.

The previous prime is 650662973. The next prime is 650663003. The reversal of 650662993 is 399266056.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 436684609 + 213978384 = 20897^2 + 14628^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-650662993 is a prime.

It is not a weakly prime, because it can be changed into another prime (650662973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325331496 + 325331497.

It is an arithmetic number, because the mean of its divisors is an integer number (325331497).

Almost surely, 2^650662993 is an apocalyptic number.

It is an amenable number.

650662993 is a deficient number, since it is larger than the sum of its proper divisors (1).

650662993 is an equidigital number, since it uses as much as digits as its factorization.

650662993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 524880, while the sum is 46.

The square root of 650662993 is about 25508.0966165647. The cubic root of 650662993 is about 866.5335234487.

The spelling of 650662993 in words is "six hundred fifty million, six hundred sixty-two thousand, nine hundred ninety-three".