208870965 has 24 divisors (see below), whose sum is σ = 363018240. Its totient is φ = 111097824.

The previous prime is 208870951. The next prime is 208870979. The reversal of 208870965 is 569078802.

It is an interprime number because it is at equal distance from previous prime (208870951) and next prime (208870979).

It is not a de Polignac number, because 208870965 - 2¹⁸ = 208608821 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 208870965.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11176 + ... + 23294.

It is an arithmetic number, because the mean of its divisors is an integer number (15125760).

Almost surely, 2^208870965 is an apocalyptic number.

It is an amenable number.

208870965 is a deficient number, since it is larger than the sum of its proper divisors (154147275).

208870965 is a wasteful number, since it uses less digits than its factorization.

208870965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12513 (or 12510 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 208870965 is about 14452.3688369762. The cubic root of 208870965 is about 593.3250589751.

The spelling of 208870965 in words is "two hundred eight million, eight hundred seventy thousand, nine hundred sixty-five".