261813934 has 8 divisors (see below), whose sum is σ = 394181640. Its totient is φ = 130420056.

The previous prime is 261813931. The next prime is 261813947. The reversal of 261813934 is 439318162.

261813934 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 261813893 and 261813902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261813931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242784 + ... + 243859.

It is an arithmetic number, because the mean of its divisors is an integer number (49272705).

Almost surely, 2^261813934 is an apocalyptic number.

261813934 is a deficient number, since it is larger than the sum of its proper divisors (132367706).

261813934 is a wasteful number, since it uses less digits than its factorization.

261813934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486914.

The product of its digits is 31104, while the sum is 37.

The square root of 261813934 is about 16180.6654374905. The cubic root of 261813934 is about 639.7312787875.

The spelling of 261813934 in words is "two hundred sixty-one million, eight hundred thirteen thousand, nine hundred thirty-four".