662921317 has 2 divisors, whose sum is σ = 662921318. Its totient is φ = 662921316.

The previous prime is 662921263. The next prime is 662921321. The reversal of 662921317 is 713129266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 346294881 + 316626436 = 18609^2 + 17794^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-662921317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (662921117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331460658 + 331460659.

It is an arithmetic number, because the mean of its divisors is an integer number (331460659).

Almost surely, 2^662921317 is an apocalyptic number.

It is an amenable number.

662921317 is a deficient number, since it is larger than the sum of its proper divisors (1).

662921317 is an equidigital number, since it uses as much as digits as its factorization.

662921317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 37.

The square root of 662921317 is about 25747.2584365792. The cubic root of 662921317 is about 871.9414594184.

The spelling of 662921317 in words is "six hundred sixty-two million, nine hundred twenty-one thousand, three hundred seventeen".