199305994969 has 9 divisors (see below), whose sum is σ = 211727579581. Its totient is φ = 187574969920.

The previous prime is 199305994939. The next prime is 199305995017. The reversal of 199305994969 is 969499503991.

The square root of 199305994969 is 446437.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 31871175625 + 167434819344 = 178525^2 + 409188^2 .

It is not a de Polignac number, because 199305994969 - 2⁹ = 199305994457 is a prime.

It is a super-2 number, since 2×199305994969² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199305994939) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7576299 + ... + 7602559.

Almost surely, 2^199305994969 is an apocalyptic number.

199305994969 is the 446437-th square number.

199305994969 is the 223219-th centered octagonal number.

It is an amenable number.

199305994969 is a deficient number, since it is larger than the sum of its proper divisors (12421584612).

199305994969 is an frugal number, since it uses more digits than its factorization.

199305994969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52556 (or 26278 counting only the distinct ones).

The product of its (nonzero) digits is 191318760, while the sum is 73.

The spelling of 199305994969 in words is "one hundred ninety-nine billion, three hundred five million, nine hundred ninety-four thousand, nine hundred sixty-nine".