191487 has 16 divisors (see below), whose sum is σ = 276480. Its totient is φ = 117600.

The previous prime is 191473. The next prime is 191491. The reversal of 191487 is 784191.

It is not a de Polignac number, because 191487 - 2⁸ = 191231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2662 + ... + 2732.

It is an arithmetic number, because the mean of its divisors is an integer number (17280).

2¹⁹¹⁴⁸⁷ is an apocalyptic number.

191487 is a deficient number, since it is larger than the sum of its proper divisors (84993).

191487 is a wasteful number, since it uses less digits than its factorization.

191487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134.

The product of its digits is 2016, while the sum is 30.

The square root of 191487 is about 437.5922759830. The cubic root of 191487 is about 57.6385568429.

Subtracting 191487 from its reverse (784191), we obtain a cube (592704 = 84³).

The spelling of 191487 in words is "one hundred ninety-one thousand, four hundred eighty-seven".