261060313 has 8 divisors (see below), whose sum is σ = 276630120. Its totient is φ = 245514240.

The previous prime is 261060299. The next prime is 261060377. The reversal of 261060313 is 313060162.

It can be written as a sum of positive squares in 4 ways, for example, as 13564489 + 247495824 = 3683^2 + 15732^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 261060313 - 2⁹ = 261059801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261060013) 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 7 ways as a sum of consecutive naturals, for example, 19993 + ... + 30361.

It is an arithmetic number, because the mean of its divisors is an integer number (34578765).

Almost surely, 2^261060313 is an apocalyptic number.

It is an amenable number.

261060313 is a deficient number, since it is larger than the sum of its proper divisors (15569807).

261060313 is a wasteful number, since it uses less digits than its factorization.

261060313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11867.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 261060313 is about 16157.3609540667. The cubic root of 261060313 is about 639.1168752138.

The spelling of 261060313 in words is "two hundred sixty-one million, sixty thousand, three hundred thirteen".