199706953 has 4 divisors (see below), whose sum is σ = 208389888. Its totient is φ = 191024020.

The previous prime is 199706951. The next prime is 199706957. The reversal of 199706953 is 359607991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 359607991 = 509 ⋅706499.

It is a cyclic number.

It is not a de Polignac number, because 199706953 - 2¹ = 199706951 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 199706897 and 199706906.

It is not an unprimeable number, because it can be changed into a prime (199706951) 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, 4341433 + ... + 4341478.

It is an arithmetic number, because the mean of its divisors is an integer number (52097472).

Almost surely, 2^199706953 is an apocalyptic number.

It is an amenable number.

199706953 is a deficient number, since it is larger than the sum of its proper divisors (8682935).

199706953 is an equidigital number, since it uses as much as digits as its factorization.

199706953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8682934.

The product of its (nonzero) digits is 459270, while the sum is 49.

The square root of 199706953 is about 14131.7710496597. The cubic root of 199706953 is about 584.5177831510.

The spelling of 199706953 in words is "one hundred ninety-nine million, seven hundred six thousand, nine hundred fifty-three".