270691 has 4 divisors (see below), whose sum is σ = 286632. Its totient is φ = 254752.

The previous prime is 270689. The next prime is 270701. The reversal of 270691 is 196072.

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 270691 - 2¹ = 270689 is a prime.

It is an Ulam number.

It is a Duffinian number.

270691 is a lucky number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (270601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7945 + ... + 7978.

It is an arithmetic number, because the mean of its divisors is an integer number (71658).

2²⁷⁰⁶⁹¹ is an apocalyptic number.

270691 is a deficient number, since it is larger than the sum of its proper divisors (15941).

270691 is a wasteful number, since it uses less digits than its factorization.

270691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15940.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 270691 is about 520.2797324517. The cubic root of 270691 is about 64.6881312999.

It can be divided in two parts, 270 and 691, that added together give a square (961 = 31²).

The spelling of 270691 in words is "two hundred seventy thousand, six hundred ninety-one".