199110454 has 4 divisors (see below), whose sum is σ = 298665684. Its totient is φ = 99555226.

The previous prime is 199110451. The next prime is 199110479. The reversal of 199110454 is 454011991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 454011991 = 271 ⋅1675321.

It is a super-2 number, since 2×199110454² = 79289945784172232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199110451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49777612 + ... + 49777615.

It is an arithmetic number, because the mean of its divisors is an integer number (74666421).

Almost surely, 2^199110454 is an apocalyptic number.

199110454 is a deficient number, since it is larger than the sum of its proper divisors (99555230).

199110454 is an equidigital number, since it uses as much as digits as its factorization.

199110454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99555229.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 199110454 is about 14110.6503748055. The cubic root of 199110454 is about 583.9352429448.

The spelling of 199110454 in words is "one hundred ninety-nine million, one hundred ten thousand, four hundred fifty-four".