206540654 has 8 divisors (see below), whose sum is σ = 316402848. Its totient is φ = 101073040.

The previous prime is 206540641. The next prime is 206540689. The reversal of 206540654 is 456045602.

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

It is a self number, because there is not a number n which added to its sum of digits gives 206540654.

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 3 ways as a sum of consecutive naturals, for example, 1098527 + ... + 1098714.

It is an arithmetic number, because the mean of its divisors is an integer number (39550356).

Almost surely, 2^206540654 is an apocalyptic number.

206540654 is a deficient number, since it is larger than the sum of its proper divisors (109862194).

206540654 is a wasteful number, since it uses less digits than its factorization.

206540654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2197290.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 206540654 is about 14371.5223271580. The cubic root of 206540654 is about 591.1102850656.

The spelling of 206540654 in words is "two hundred six million, five hundred forty thousand, six hundred fifty-four".