199780054 has 8 divisors (see below), whose sum is σ = 301402800. Its totient is φ = 99312456.

The previous prime is 199780051. The next prime is 199780099. The reversal of 199780054 is 450087991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199780051) 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, 288354 + ... + 289045.

It is an arithmetic number, because the mean of its divisors is an integer number (37675350).

Almost surely, 2^199780054 is an apocalyptic number.

199780054 is a deficient number, since it is larger than the sum of its proper divisors (101622746).

199780054 is a wasteful number, since it uses less digits than its factorization.

199780054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577574.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 199780054 is about 14134.3572192017. The cubic root of 199780054 is about 584.5890936744.

The spelling of 199780054 in words is "one hundred ninety-nine million, seven hundred eighty thousand, fifty-four".