199997470 has 16 divisors (see below), whose sum is σ = 360295200. Its totient is φ = 79932384.

The previous prime is 199997459. The next prime is 199997491. The reversal of 199997470 is 74799991.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5356 + ... + 20704.

It is an arithmetic number, because the mean of its divisors is an integer number (22518450).

Almost surely, 2^199997470 is an apocalyptic number.

199997470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199997470 is a deficient number, since it is larger than the sum of its proper divisors (160297730).

199997470 is a wasteful number, since it uses less digits than its factorization.

199997470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16659.

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

The square root of 199997470 is about 14142.0461744402. The cubic root of 199997470 is about 584.8010817105.

The spelling of 199997470 in words is "one hundred ninety-nine million, nine hundred ninety-seven thousand, four hundred seventy".