197209438 has 16 divisors (see below), whose sum is σ = 306535680. Its totient is φ = 95089176.

The previous prime is 197209421. The next prime is 197209459. The reversal of 197209438 is 834902791.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a junction number, because it is equal to n+sod(n) for n = 197209394 and 197209403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7720 + ... + 21307.

It is an arithmetic number, because the mean of its divisors is an integer number (19158480).

Almost surely, 2^197209438 is an apocalyptic number.

197209438 is a deficient number, since it is larger than the sum of its proper divisors (109326242).

197209438 is a wasteful number, since it uses less digits than its factorization.

197209438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29151.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 197209438 is about 14043.1277855042. The cubic root of 197209438 is about 582.0709143917.

The spelling of 197209438 in words is "one hundred ninety-seven million, two hundred nine thousand, four hundred thirty-eight".