197491533 has 16 divisors (see below), whose sum is σ = 286349760. Its totient is φ = 120566016.

The previous prime is 197491523. The next prime is 197491543. The reversal of 197491533 is 335194791.

It is an interprime number because it is at equal distance from previous prime (197491523) and next prime (197491543).

It is not a de Polignac number, because 197491533 - 2¹⁰ = 197490509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197491513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50443 + ... + 54216.

It is an arithmetic number, because the mean of its divisors is an integer number (17896860).

Almost surely, 2^197491533 is an apocalyptic number.

It is an amenable number.

197491533 is a deficient number, since it is larger than the sum of its proper divisors (88858227).

197491533 is a wasteful number, since it uses less digits than its factorization.

197491533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104716.

The product of its digits is 102060, while the sum is 42.

The square root of 197491533 is about 14053.1680769853. The cubic root of 197491533 is about 582.3483200885.

The spelling of 197491533 in words is "one hundred ninety-seven million, four hundred ninety-one thousand, five hundred thirty-three".