261479353 has 4 divisors (see below), whose sum is σ = 262372068. Its totient is φ = 260586640.

The previous prime is 261479287. The next prime is 261479381. The reversal of 261479353 is 353974162.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 224610169 + 36869184 = 14987^2 + 6072^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261479353 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (265479353) 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, 445918 + ... + 446503.

It is an arithmetic number, because the mean of its divisors is an integer number (65593017).

Almost surely, 2^261479353 is an apocalyptic number.

It is an amenable number.

261479353 is a deficient number, since it is larger than the sum of its proper divisors (892715).

261479353 is an equidigital number, since it uses as much as digits as its factorization.

261479353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892714.

The product of its digits is 136080, while the sum is 40.

The square root of 261479353 is about 16170.3232187857. The cubic root of 261479353 is about 639.4586511117.

The spelling of 261479353 in words is "two hundred sixty-one million, four hundred seventy-nine thousand, three hundred fifty-three".