199240723 has 4 divisors (see below), whose sum is σ = 217353528. Its totient is φ = 181127920.

The previous prime is 199240711. The next prime is 199240729. The reversal of 199240723 is 327042991.

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

It is a cyclic number.

It is not a de Polignac number, because 199240723 - 2²⁵ = 165686291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199240729) 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, 9056386 + ... + 9056407.

It is an arithmetic number, because the mean of its divisors is an integer number (54338382).

Almost surely, 2^199240723 is an apocalyptic number.

199240723 is a deficient number, since it is larger than the sum of its proper divisors (18112805).

199240723 is a wasteful number, since it uses less digits than its factorization.

199240723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18112804.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 199240723 is about 14115.2656014685. The cubic root of 199240723 is about 584.0625626899.

The spelling of 199240723 in words is "one hundred ninety-nine million, two hundred forty thousand, seven hundred twenty-three".