208140961 has 8 divisors (see below), whose sum is σ = 248217984. Its totient is φ = 170649600.

The previous prime is 208140937. The next prime is 208140983. The reversal of 208140961 is 169041802.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 208140961 - 2⁷ = 208140833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (208144961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 646240 + ... + 646561.

It is an arithmetic number, because the mean of its divisors is an integer number (31027248).

Almost surely, 2^208140961 is an apocalyptic number.

It is an amenable number.

208140961 is a deficient number, since it is larger than the sum of its proper divisors (40077023).

208140961 is a wasteful number, since it uses less digits than its factorization.

208140961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292831.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 208140961 is about 14427.0912175670. The cubic root of 208140961 is about 592.6330284601.

The spelling of 208140961 in words is "two hundred eight million, one hundred forty thousand, nine hundred sixty-one".