191493 has 6 divisors (see below), whose sum is σ = 276614. Its totient is φ = 127656.

The previous prime is 191491. The next prime is 191497. The reversal of 191493 is 394191.

It can be written as a sum of positive squares in only one way, i.e., 116964 + 74529 = 342^2 + 273^2 .

It is not a de Polignac number, because 191493 - 2¹ = 191491 is a prime.

It is a Duffinian number.

191493 is a lucky 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 191493.

It is not an unprimeable number, because it can be changed into a prime (191491) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10630 + ... + 10647.

2¹⁹¹⁴⁹³ is an apocalyptic number.

It is an amenable number.

191493 is a deficient number, since it is larger than the sum of its proper divisors (85121).

191493 is a wasteful number, since it uses less digits than its factorization.

191493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21283 (or 21280 counting only the distinct ones).

The product of its digits is 972, while the sum is 27.

The square root of 191493 is about 437.5991316262. The cubic root of 191493 is about 57.6391588467.

The spelling of 191493 in words is "one hundred ninety-one thousand, four hundred ninety-three".