199988653 has 2 divisors, whose sum is σ = 199988654. Its totient is φ = 199988652.

The previous prime is 199988603. The next prime is 199988681. The reversal of 199988653 is 356889991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184606569 + 15382084 = 13587^2 + 3922^2 .

It is an emirp because it is prime and its reverse (356889991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199988653 - 2²¹ = 197891501 is a prime.

It is a super-2 number, since 2×199988653² = 79990922657508818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199988603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99994326 + 99994327.

It is an arithmetic number, because the mean of its divisors is an integer number (99994327).

Almost surely, 2^199988653 is an apocalyptic number.

It is an amenable number.

199988653 is a deficient number, since it is larger than the sum of its proper divisors (1).

199988653 is an equidigital number, since it uses as much as digits as its factorization.

199988653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4199040, while the sum is 58.

The square root of 199988653 is about 14141.7344410083. The cubic root of 199988653 is about 584.7924878237.

The spelling of 199988653 in words is "one hundred ninety-nine million, nine hundred eighty-eight thousand, six hundred fifty-three".