650406642397 has 2 divisors, whose sum is σ = 650406642398. Its totient is φ = 650406642396.

The previous prime is 650406642383. The next prime is 650406642401. The reversal of 650406642397 is 793246604056.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 650392247961 + 14394436 = 806469^2 + 3794^2 .

It is a cyclic number.

It is not a de Polignac number, because 650406642397 - 2¹¹ = 650406640349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (650406642377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325203321198 + 325203321199.

It is an arithmetic number, because the mean of its divisors is an integer number (325203321199).

Almost surely, 2^650406642397 is an apocalyptic number.

It is an amenable number.

650406642397 is a deficient number, since it is larger than the sum of its proper divisors (1).

650406642397 is an equidigital number, since it uses as much as digits as its factorization.

650406642397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6531840, while the sum is 52.

The spelling of 650406642397 in words is "six hundred fifty billion, four hundred six million, six hundred forty-two thousand, three hundred ninety-seven".