608807981 has 2 divisors, whose sum is σ = 608807982. Its totient is φ = 608807980.

The previous prime is 608807963. The next prime is 608808001. The reversal of 608807981 is 189708806.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 606833956 + 1974025 = 24634^2 + 1405^2 .

It is a cyclic number.

It is not a de Polignac number, because 608807981 - 2¹⁸ = 608545837 is a prime.

It is a super-2 number, since 2×608807981² = 741294315458592722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (608807911) 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, 304403990 + 304403991.

It is an arithmetic number, because the mean of its divisors is an integer number (304403991).

Almost surely, 2^608807981 is an apocalyptic number.

It is an amenable number.

608807981 is a deficient number, since it is larger than the sum of its proper divisors (1).

608807981 is an equidigital number, since it uses as much as digits as its factorization.

608807981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 47.

The square root of 608807981 is about 24674.0345505148. The cubic root of 608807981 is about 847.5398210217.

The spelling of 608807981 in words is "six hundred eight million, eight hundred seven thousand, nine hundred eighty-one".