268861609 has 9 divisors (see below), whose sum is σ = 284086173. Its totient is φ = 254415852.

The previous prime is 268861597. The next prime is 268861627. The reversal of 268861609 is 906168862.

The square root of 268861609 is 16397.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 268861609 - 2⁹ = 268861097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (268865609) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 311112 + ... + 311974.

Almost surely, 2^268861609 is an apocalyptic number.

268861609 is the 16397-th square number.

268861609 is the 8199-th centered octagonal number.

It is an amenable number.

268861609 is a deficient number, since it is larger than the sum of its proper divisors (15224564).

268861609 is an frugal number, since it uses more digits than its factorization.

268861609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1764 (or 882 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 46.

The cubic root of 268861609 is about 645.4207610547.

The spelling of 268861609 in words is "two hundred sixty-eight million, eight hundred sixty-one thousand, six hundred nine".