261876359 has 4 divisors (see below), whose sum is σ = 264818880. Its totient is φ = 258933840.

The previous prime is 261876353. The next prime is 261876379. The reversal of 261876359 is 953678162.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 953678162 = 2 ⋅476839081.

It is a cyclic number.

It is not a de Polignac number, because 261876359 - 2²⁰ = 260827783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261876353) 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, 1471127 + ... + 1471304.

It is an arithmetic number, because the mean of its divisors is an integer number (66204720).

Almost surely, 2^261876359 is an apocalyptic number.

261876359 is a deficient number, since it is larger than the sum of its proper divisors (2942521).

261876359 is an equidigital number, since it uses as much as digits as its factorization.

261876359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2942520.

The product of its digits is 544320, while the sum is 47.

The square root of 261876359 is about 16182.5943222958. The cubic root of 261876359 is about 639.7821190298.

The spelling of 261876359 in words is "two hundred sixty-one million, eight hundred seventy-six thousand, three hundred fifty-nine".