191069 has 4 divisors (see below), whose sum is σ = 192444. Its totient is φ = 189696.

The previous prime is 191057. The next prime is 191071. The reversal of 191069 is 960191.

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 60025 + 131044 = 245^2 + 362^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-191069 is a prime.

It is a super-2 number, since 2×191069² = 73014725522, which contains 22 as substring.

It is a Duffinian number.

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 191069.

It is not an unprimeable number, because it can be changed into a prime (191039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 452 + ... + 765.

It is an arithmetic number, because the mean of its divisors is an integer number (48111).

2¹⁹¹⁰⁶⁹ is an apocalyptic number.

It is an amenable number.

191069 is a deficient number, since it is larger than the sum of its proper divisors (1375).

191069 is a wasteful number, since it uses less digits than its factorization.

191069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1374.

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 191069 is about 437.1144015015. The cubic root of 191069 is about 57.5965862496.

The spelling of 191069 in words is "one hundred ninety-one thousand, sixty-nine".