197404839 has 12 divisors (see below), whose sum is σ = 286620256. Its totient is φ = 130920192.

The previous prime is 197404811. The next prime is 197404853. The reversal of 197404839 is 938404791.

It is not a de Polignac number, because 197404839 - 2¹⁷ = 197273767 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 197404794 and 197404803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197404859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55087 + ... + 58560.

Almost surely, 2^197404839 is an apocalyptic number.

197404839 is a deficient number, since it is larger than the sum of its proper divisors (89215417).

197404839 is a wasteful number, since it uses less digits than its factorization.

197404839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113846 (or 113843 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 197404839 is about 14050.0832381876. The cubic root of 197404839 is about 582.2630953472.

The spelling of 197404839 in words is "one hundred ninety-seven million, four hundred four thousand, eight hundred thirty-nine".