197223790 has 16 divisors (see below), whose sum is σ = 355276368. Its totient is φ = 78828736.

The previous prime is 197223721. The next prime is 197223821. The reversal of 197223790 is 97322791.

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, 7449 + ... + 21211.

It is an arithmetic number, because the mean of its divisors is an integer number (22204773).

Almost surely, 2^197223790 is an apocalyptic number.

197223790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

197223790 is a deficient number, since it is larger than the sum of its proper divisors (158052578).

197223790 is a wasteful number, since it uses less digits than its factorization.

197223790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15203.

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 197223790 is about 14043.6387734803. The cubic root of 197223790 is about 582.0850342013.

Subtracting from 197223790 its reverse (97322791), we obtain a palindrome (99900999).

The spelling of 197223790 in words is "one hundred ninety-seven million, two hundred twenty-three thousand, seven hundred ninety".