261682723 has 2 divisors, whose sum is σ = 261682724. Its totient is φ = 261682722.

The previous prime is 261682721. The next prime is 261682769. The reversal of 261682723 is 327286162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261682723 - 2¹ = 261682721 is a prime.

Together with 261682721, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (261682721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130841361 + 130841362.

It is an arithmetic number, because the mean of its divisors is an integer number (130841362).

Almost surely, 2^261682723 is an apocalyptic number.

261682723 is a deficient number, since it is larger than the sum of its proper divisors (1).

261682723 is an equidigital number, since it uses as much as digits as its factorization.

261682723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 37.

The square root of 261682723 is about 16176.6103680592. The cubic root of 261682723 is about 639.6243914192.

The spelling of 261682723 in words is "two hundred sixty-one million, six hundred eighty-two thousand, seven hundred twenty-three".