197439285 has 32 divisors (see below), whose sum is σ = 325251072. Its totient is φ = 102231360.

The previous prime is 197439271. The next prime is 197439293. The reversal of 197439285 is 582934791.

It is not a de Polignac number, because 197439285 - 2¹¹ = 197437237 is a prime.

It is a super-2 number, since 2×197439285² = 77964542522622450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69972 + ... + 72738.

It is an arithmetic number, because the mean of its divisors is an integer number (10164096).

Almost surely, 2^197439285 is an apocalyptic number.

197439285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

197439285 is a deficient number, since it is larger than the sum of its proper divisors (127811787).

197439285 is a wasteful number, since it uses less digits than its factorization.

197439285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2913.

The product of its digits is 544320, while the sum is 48.

The square root of 197439285 is about 14051.3090137538. The cubic root of 197439285 is about 582.2969605557.

The spelling of 197439285 in words is "one hundred ninety-seven million, four hundred thirty-nine thousand, two hundred eighty-five".