197439135 has 16 divisors (see below), whose sum is σ = 319161696. Its totient is φ = 104214528.

The previous prime is 197439133. The next prime is 197439169. The reversal of 197439135 is 531934791.

It is not a de Polignac number, because 197439135 - 2¹ = 197439133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197439131) 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, 66394 + ... + 69303.

It is an arithmetic number, because the mean of its divisors is an integer number (19947606).

Almost surely, 2^197439135 is an apocalyptic number.

197439135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

197439135 is a deficient number, since it is larger than the sum of its proper divisors (121722561).

197439135 is a wasteful number, since it uses less digits than its factorization.

197439135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135802.

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

The square root of 197439135 is about 14051.3036761718. The cubic root of 197439135 is about 582.2968130934.

The spelling of 197439135 in words is "one hundred ninety-seven million, four hundred thirty-nine thousand, one hundred thirty-five".