261734727 has 4 divisors (see below), whose sum is σ = 348979640. Its totient is φ = 174489816.

The previous prime is 261734719. The next prime is 261734729. The reversal of 261734727 is 727437162.

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

It is not a de Polignac number, because 261734727 - 2³ = 261734719 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 (261734729) 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, 43622452 + ... + 43622457.

It is an arithmetic number, because the mean of its divisors is an integer number (87244910).

Almost surely, 2^261734727 is an apocalyptic number.

261734727 is a deficient number, since it is larger than the sum of its proper divisors (87244913).

261734727 is an equidigital number, since it uses as much as digits as its factorization.

261734727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87244912.

The product of its digits is 98784, while the sum is 39.

The square root of 261734727 is about 16178.2176706830. The cubic root of 261734727 is about 639.6667592954. Note that the first 3 decimals are identical.

The spelling of 261734727 in words is "two hundred sixty-one million, seven hundred thirty-four thousand, seven hundred twenty-seven".