199960729 has 2 divisors, whose sum is σ = 199960730. Its totient is φ = 199960728.

The previous prime is 199960727. The next prime is 199960753. The reversal of 199960729 is 927069991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185913225 + 14047504 = 13635^2 + 3748^2 .

It is an emirp because it is prime and its reverse (927069991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199960729 - 2¹ = 199960727 is a prime.

It is a super-2 number, since 2×199960729² = 79968586284422882, which contains 22 as substring.

Together with 199960727, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (199960723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99980364 + 99980365.

It is an arithmetic number, because the mean of its divisors is an integer number (99980365).

Almost surely, 2^199960729 is an apocalyptic number.

It is an amenable number.

199960729 is a deficient number, since it is larger than the sum of its proper divisors (1).

199960729 is an equidigital number, since it uses as much as digits as its factorization.

199960729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 551124, while the sum is 52.

The square root of 199960729 is about 14140.7471160473. The cubic root of 199960729 is about 584.7652687702.

The spelling of 199960729 in words is "one hundred ninety-nine million, nine hundred sixty thousand, seven hundred twenty-nine".