199192693 has 6 divisors (see below), whose sum is σ = 231714006. Its totient is φ = 170736552.

The previous prime is 199192687. The next prime is 199192711. The reversal of 199192693 is 396291991.

It can be written as a sum of positive squares in only one way, i.e., 157176369 + 42016324 = 12537^2 + 6482^2 .

It is not a de Polignac number, because 199192693 - 2⁵ = 199192661 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49), and also a Moran number because the ratio is a prime number: 4065157 = 199192693 / (1 + 9 + 9 + 1 + 9 + 2 + 6 + 9 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199192193) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2032530 + ... + 2032627.

It is an arithmetic number, because the mean of its divisors is an integer number (38619001).

Almost surely, 2^199192693 is an apocalyptic number.

It is an amenable number.

199192693 is a deficient number, since it is larger than the sum of its proper divisors (32521313).

199192693 is an equidigital number, since it uses as much as digits as its factorization.

199192693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4065171 (or 4065164 counting only the distinct ones).

The product of its digits is 236196, while the sum is 49.

The square root of 199192693 is about 14113.5641494273. The cubic root of 199192693 is about 584.0156265366.

The spelling of 199192693 in words is "one hundred ninety-nine million, one hundred ninety-two thousand, six hundred ninety-three".