261751713 has 4 divisors (see below), whose sum is σ = 349002288. Its totient is φ = 174501140.

The previous prime is 261751697. The next prime is 261751717. The reversal of 261751713 is 317157162.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 261751713 - 2⁴ = 261751697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261751717) 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, 43625283 + ... + 43625288.

It is an arithmetic number, because the mean of its divisors is an integer number (87250572).

Almost surely, 2^261751713 is an apocalyptic number.

It is an amenable number.

261751713 is a deficient number, since it is larger than the sum of its proper divisors (87250575).

261751713 is an equidigital number, since it uses as much as digits as its factorization.

261751713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87250574.

The product of its digits is 8820, while the sum is 33.

The square root of 261751713 is about 16178.7426272872. The cubic root of 261751713 is about 639.6805966447.

The spelling of 261751713 in words is "two hundred sixty-one million, seven hundred fifty-one thousand, seven hundred thirteen".