199288973 has 4 divisors (see below), whose sum is σ = 214618908. Its totient is φ = 183959040.

The previous prime is 199288939. The next prime is 199289003. The reversal of 199288973 is 379882991.

199288973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 45454564 + 153834409 = 6742^2 + 12403^2 .

It is a cyclic number.

It is not a de Polignac number, because 199288973 - 2¹⁸ = 199026829 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 (199288913) 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, 7664948 + ... + 7664973.

It is an arithmetic number, because the mean of its divisors is an integer number (53654727).

Almost surely, 2^199288973 is an apocalyptic number.

199288973 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

199288973 is a deficient number, since it is larger than the sum of its proper divisors (15329935).

199288973 is a wasteful number, since it uses less digits than its factorization.

199288973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15329934.

The product of its digits is 1959552, while the sum is 56.

The square root of 199288973 is about 14116.9746404816. The cubic root of 199288973 is about 584.1097062384.

The spelling of 199288973 in words is "one hundred ninety-nine million, two hundred eighty-eight thousand, nine hundred seventy-three".