199169970 has 64 divisors (see below), whose sum is σ = 520560000. Its totient is φ = 48577536.

The previous prime is 199169963. The next prime is 199169987. The reversal of 199169970 is 79961991.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10506 + ... + 22554.

It is an arithmetic number, because the mean of its divisors is an integer number (8133750).

Almost surely, 2^199169970 is an apocalyptic number.

199169970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 199169970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260280000).

199169970 is an abundant number, since it is smaller than the sum of its proper divisors (321390030).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199169970 is a wasteful number, since it uses less digits than its factorization.

199169970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12107.

The product of its (nonzero) digits is 275562, while the sum is 51.

The square root of 199169970 is about 14112.7591207389. The cubic root of 199169970 is about 583.9934184065.

The spelling of 199169970 in words is "one hundred ninety-nine million, one hundred sixty-nine thousand, nine hundred seventy".