206447972 has 12 divisors (see below), whose sum is σ = 372938496. Its totient is φ = 99894120.

The previous prime is 206447959. The next prime is 206447981. The reversal of 206447972 is 279744602.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 832328 + ... + 832575.

It is an arithmetic number, because the mean of its divisors is an integer number (31078208).

Almost surely, 2^206447972 is an apocalyptic number.

It is an amenable number.

206447972 is a deficient number, since it is larger than the sum of its proper divisors (166490524).

206447972 is a wasteful number, since it uses less digits than its factorization.

206447972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1664938 (or 1664936 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 41.

The square root of 206447972 is about 14368.2974635132. The cubic root of 206447972 is about 591.0218545652.

The spelling of 206447972 in words is "two hundred six million, four hundred forty-seven thousand, nine hundred seventy-two".