261712727 has 4 divisors (see below), whose sum is σ = 263041416. Its totient is φ = 260384040.

The previous prime is 261712723. The next prime is 261712741. The reversal of 261712727 is 727217162.

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

It is a cyclic number.

It is not a de Polignac number, because 261712727 - 2² = 261712723 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261712723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 664049 + ... + 664442.

It is an arithmetic number, because the mean of its divisors is an integer number (65760354).

Almost surely, 2^261712727 is an apocalyptic number.

261712727 is a deficient number, since it is larger than the sum of its proper divisors (1328689).

261712727 is a wasteful number, since it uses less digits than its factorization.

261712727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328688.

The product of its digits is 16464, while the sum is 35.

The square root of 261712727 is about 16177.5377298277. The cubic root of 261712727 is about 639.6488364884.

Adding to 261712727 its reverse (727217162), we get a palindrome (988929889).

The spelling of 261712727 in words is "two hundred sixty-one million, seven hundred twelve thousand, seven hundred twenty-seven".