261174313 has 4 divisors (see below), whose sum is σ = 261210708. Its totient is φ = 261137920.

The previous prime is 261174311. The next prime is 261174317. The reversal of 261174313 is 313471162.

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 184226329 + 76947984 = 13573^2 + 8772^2 .

It is a cyclic number.

It is not a de Polignac number, because 261174313 - 2¹ = 261174311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261174311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3448 + ... + 23113.

It is an arithmetic number, because the mean of its divisors is an integer number (65302677).

Almost surely, 2^261174313 is an apocalyptic number.

It is an amenable number.

261174313 is a deficient number, since it is larger than the sum of its proper divisors (36395).

261174313 is an equidigital number, since it uses as much as digits as its factorization.

261174313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36394.

The product of its digits is 3024, while the sum is 28.

The square root of 261174313 is about 16160.8883728587. Note that the first 3 decimals coincide. The cubic root of 261174313 is about 639.2098916769.

The spelling of 261174313 in words is "two hundred sixty-one million, one hundred seventy-four thousand, three hundred thirteen".