261714653 has 4 divisors (see below), whose sum is σ = 268788060. Its totient is φ = 254641248.

The previous prime is 261714613. The next prime is 261714671. The reversal of 261714653 is 356417162.

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 171426649 + 90288004 = 13093^2 + 9502^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261714653 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 (261714613) 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, 3536648 + ... + 3536721.

It is an arithmetic number, because the mean of its divisors is an integer number (67197015).

Almost surely, 2^261714653 is an apocalyptic number.

It is an amenable number.

261714653 is a deficient number, since it is larger than the sum of its proper divisors (7073407).

261714653 is an equidigital number, since it uses as much as digits as its factorization.

261714653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7073406.

The product of its digits is 30240, while the sum is 35.

The square root of 261714653 is about 16177.5972567004. The cubic root of 261714653 is about 639.6504055888.

The spelling of 261714653 in words is "two hundred sixty-one million, seven hundred fourteen thousand, six hundred fifty-three".