608221993 has 2 divisors, whose sum is σ = 608221994. Its totient is φ = 608221992.

The previous prime is 608221979. The next prime is 608222081. The reversal of 608221993 is 399122806.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 607770409 + 451584 = 24653^2 + 672^2 .

It is a cyclic number.

It is not a de Polignac number, because 608221993 - 2⁵ = 608221961 is a prime.

It is a super-3 number, since 3×608221993³ (a number of 27 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (608221093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304110996 + 304110997.

It is an arithmetic number, because the mean of its divisors is an integer number (304110997).

Almost surely, 2^608221993 is an apocalyptic number.

It is an amenable number.

608221993 is a deficient number, since it is larger than the sum of its proper divisors (1).

608221993 is an equidigital number, since it uses as much as digits as its factorization.

608221993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 608221993 is about 24662.1571035463. The cubic root of 608221993 is about 847.2678099173.

The spelling of 608221993 in words is "six hundred eight million, two hundred twenty-one thousand, nine hundred ninety-three".