651312617 has 2 divisors, whose sum is σ = 651312618. Its totient is φ = 651312616.

The previous prime is 651312583. The next prime is 651312631. The reversal of 651312617 is 716213156.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 646379776 + 4932841 = 25424^2 + 2221^2 .

It is a cyclic number.

It is not a de Polignac number, because 651312617 - 2¹⁰ = 651311593 is a prime.

It is not a weakly prime, because it can be changed into another prime (651314617) 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, 325656308 + 325656309.

It is an arithmetic number, because the mean of its divisors is an integer number (325656309).

Almost surely, 2^651312617 is an apocalyptic number.

It is an amenable number.

651312617 is a deficient number, since it is larger than the sum of its proper divisors (1).

651312617 is an equidigital number, since it uses as much as digits as its factorization.

651312617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 32.

The square root of 651312617 is about 25520.8271221761. The cubic root of 651312617 is about 866.8218108022.

The spelling of 651312617 in words is "six hundred fifty-one million, three hundred twelve thousand, six hundred seventeen".