199846454 has 4 divisors (see below), whose sum is σ = 299769684. Its totient is φ = 99923226.

The previous prime is 199846447. The next prime is 199846459. The reversal of 199846454 is 454648991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 454648991 = 97 ⋅4687103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199846459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49961612 + ... + 49961615.

It is an arithmetic number, because the mean of its divisors is an integer number (74942421).

Almost surely, 2^199846454 is an apocalyptic number.

199846454 is a deficient number, since it is larger than the sum of its proper divisors (99923230).

199846454 is an equidigital number, since it uses as much as digits as its factorization.

199846454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99923229.

The product of its digits is 1244160, while the sum is 50.

The square root of 199846454 is about 14136.7059105012. The cubic root of 199846454 is about 584.6538522516.

The spelling of 199846454 in words is "one hundred ninety-nine million, eight hundred forty-six thousand, four hundred fifty-four".