260862809 has 4 divisors (see below), whose sum is σ = 261100416. Its totient is φ = 260625204.

The previous prime is 260862781. The next prime is 260862821. The reversal of 260862809 is 908268062.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 260862809 - 2¹² = 260858713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (260862409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117149 + ... + 119354.

It is an arithmetic number, because the mean of its divisors is an integer number (65275104).

Almost surely, 2^260862809 is an apocalyptic number.

It is an amenable number.

260862809 is a deficient number, since it is larger than the sum of its proper divisors (237607).

260862809 is a wasteful number, since it uses less digits than its factorization.

260862809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237606.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 260862809 is about 16151.2479084435. The cubic root of 260862809 is about 638.9556608904.

The spelling of 260862809 in words is "two hundred sixty million, eight hundred sixty-two thousand, eight hundred nine".