261884679 has 32 divisors (see below), whose sum is σ = 404752896. Its totient is φ = 147532800.

The previous prime is 261884669. The next prime is 261884729. The reversal of 261884679 is 976488162.

261884679 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 261884679 - 2¹¹ = 261882631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261884639) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 652879 + ... + 653279.

It is an arithmetic number, because the mean of its divisors is an integer number (12648528).

Almost surely, 2^261884679 is an apocalyptic number.

261884679 is a deficient number, since it is larger than the sum of its proper divisors (142868217).

261884679 is a wasteful number, since it uses less digits than its factorization.

261884679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775.

The product of its digits is 1161216, while the sum is 51.

The square root of 261884679 is about 16182.8513865759. The cubic root of 261884679 is about 639.7888944039.

The spelling of 261884679 in words is "two hundred sixty-one million, eight hundred eighty-four thousand, six hundred seventy-nine".