261788883 has 4 divisors (see below), whose sum is σ = 349051848. Its totient is φ = 174525920.

The previous prime is 261788861. The next prime is 261788909. The reversal of 261788883 is 388887162.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 261788883 - 2⁶ = 261788819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261788833) 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, 43631478 + ... + 43631483.

It is an arithmetic number, because the mean of its divisors is an integer number (87262962).

Almost surely, 2^261788883 is an apocalyptic number.

261788883 is a deficient number, since it is larger than the sum of its proper divisors (87262965).

261788883 is an equidigital number, since it uses as much as digits as its factorization.

261788883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87262964.

The product of its digits is 1032192, while the sum is 51.

The square root of 261788883 is about 16179.8913160750. The cubic root of 261788883 is about 639.7108744503.

The spelling of 261788883 in words is "two hundred sixty-one million, seven hundred eighty-eight thousand, eight hundred eighty-three".