199499770 has 8 divisors (see below), whose sum is σ = 359099604. Its totient is φ = 79799904.

The previous prime is 199499767. The next prime is 199499771. The reversal of 199499770 is 77994991.

It can be written as a sum of positive squares in 2 ways, for example, as 197149681 + 2350089 = 14041^2 + 1533^2 .

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

It is not an unprimeable number, because it can be changed into a prime (199499771) 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, 9974979 + ... + 9974998.

Almost surely, 2^199499770 is an apocalyptic number.

199499770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199499770 is a deficient number, since it is larger than the sum of its proper divisors (159599834).

199499770 is a wasteful number, since it uses less digits than its factorization.

199499770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19949984.

The product of its (nonzero) digits is 1285956, while the sum is 55.

The square root of 199499770 is about 14124.4387499114. The cubic root of 199499770 is about 584.3155801251.

The spelling of 199499770 in words is "one hundred ninety-nine million, four hundred ninety-nine thousand, seven hundred seventy".