269991 has 12 divisors (see below), whose sum is σ = 394680. Its totient is φ = 177840.

The previous prime is 269987. The next prime is 270001. The reversal of 269991 is 199962.

It is not a de Polignac number, because 269991 - 2² = 269987 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 269991.

It is not an unprimeable number, because it can be changed into a prime (269981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1065 + ... + 1293.

It is an arithmetic number, because the mean of its divisors is an integer number (32890).

2²⁶⁹⁹⁹¹ is an apocalyptic number.

269991 is a deficient number, since it is larger than the sum of its proper divisors (124689).

269991 is a wasteful number, since it uses less digits than its factorization.

269991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366 (or 363 counting only the distinct ones).

The product of its digits is 8748, while the sum is 36.

The square root of 269991 is about 519.6065819445. The cubic root of 269991 is about 64.6323225481.

It can be divided in two parts, 26999 and 1, that added together give a cube (27000 = 30³).

The spelling of 269991 in words is "two hundred sixty-nine thousand, nine hundred ninety-one".