199308653 has 4 divisors (see below), whose sum is σ = 201282108. Its totient is φ = 197335200.

The previous prime is 199308617. The next prime is 199308661. The reversal of 199308653 is 356803991.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 129117769 + 70190884 = 11363^2 + 8378^2 .

It is a cyclic number.

It is not a de Polignac number, because 199308653 - 2¹⁰ = 199307629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199308953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 986576 + ... + 986777.

It is an arithmetic number, because the mean of its divisors is an integer number (50320527).

Almost surely, 2^199308653 is an apocalyptic number.

It is an amenable number.

199308653 is a deficient number, since it is larger than the sum of its proper divisors (1973455).

199308653 is a wasteful number, since it uses less digits than its factorization.

199308653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1973454.

The product of its (nonzero) digits is 174960, while the sum is 44.

The square root of 199308653 is about 14117.6716564737. The cubic root of 199308653 is about 584.1289327590.

The spelling of 199308653 in words is "one hundred ninety-nine million, three hundred eight thousand, six hundred fifty-three".