209147672 has 16 divisors (see below), whose sum is σ = 394321200. Its totient is φ = 103995360.

The previous prime is 209147663. The next prime is 209147677. The reversal of 209147672 is 276741902.

209147672 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209147677) 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, 70772 + ... + 73667.

It is an arithmetic number, because the mean of its divisors is an integer number (24645075).

Almost surely, 2^209147672 is an apocalyptic number.

It is an amenable number.

209147672 is a deficient number, since it is larger than the sum of its proper divisors (185173528).

209147672 is a wasteful number, since it uses less digits than its factorization.

209147672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144626 (or 144622 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 209147672 is about 14461.9387358680. The cubic root of 209147672 is about 593.5869507306.

The spelling of 209147672 in words is "two hundred nine million, one hundred forty-seven thousand, six hundred seventy-two".