208686994 has 8 divisors (see below), whose sum is σ = 329505840. Its totient is φ = 98851716.

The previous prime is 208686979. The next prime is 208686997. The reversal of 208686994 is 499686802.

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

It is a super-2 number, since 2×208686994² = 87100522929512072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (208686997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2745844 + ... + 2745919.

It is an arithmetic number, because the mean of its divisors is an integer number (41188230).

Almost surely, 2^208686994 is an apocalyptic number.

208686994 is a deficient number, since it is larger than the sum of its proper divisors (120818846).

208686994 is a wasteful number, since it uses less digits than its factorization.

208686994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5491784.

The product of its (nonzero) digits is 1492992, while the sum is 52.

The square root of 208686994 is about 14446.0026997090. The cubic root of 208686994 is about 593.1508099797.

The spelling of 208686994 in words is "two hundred eight million, six hundred eighty-six thousand, nine hundred ninety-four".