199800455 has 4 divisors (see below), whose sum is σ = 239760552. Its totient is φ = 159840360.

The previous prime is 199800449. The next prime is 199800463. The reversal of 199800455 is 554008991.

It is a happy number.

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

It is not a de Polignac number, because 199800455 - 2⁸ = 199800199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19980041 + ... + 19980050.

It is an arithmetic number, because the mean of its divisors is an integer number (59940138).

Almost surely, 2^199800455 is an apocalyptic number.

199800455 is a deficient number, since it is larger than the sum of its proper divisors (39960097).

199800455 is an equidigital number, since it uses as much as digits as its factorization.

199800455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39960096.

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 199800455 is about 14135.0788819872. The cubic root of 199800455 is about 584.6089918840.

The spelling of 199800455 in words is "one hundred ninety-nine million, eight hundred thousand, four hundred fifty-five".