662317987 has 2 divisors, whose sum is σ = 662317988. Its totient is φ = 662317986.

The previous prime is 662317961. The next prime is 662318047. The reversal of 662317987 is 789713266.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 662317987 - 2¹⁵ = 662285219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 662317987.

It is not a weakly prime, because it can be changed into another prime (662317787) 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, 331158993 + 331158994.

It is an arithmetic number, because the mean of its divisors is an integer number (331158994).

Almost surely, 2^662317987 is an apocalyptic number.

662317987 is a deficient number, since it is larger than the sum of its proper divisors (1).

662317987 is an equidigital number, since it uses as much as digits as its factorization.

662317987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 49.

The square root of 662317987 is about 25735.5393765120. The cubic root of 662317987 is about 871.6768588285.

It can be divided in two parts, 6623179 and 87, that added together give a palindrome (6623266).

The spelling of 662317987 in words is "six hundred sixty-two million, three hundred seventeen thousand, nine hundred eighty-seven".