197567990 has 16 divisors (see below), whose sum is σ = 361650960. Its totient is φ = 77687520.

The previous prime is 197567989. The next prime is 197568011. The reversal of 197567990 is 99765791.

It is a super-2 number, since 2×197567990² = 78066221345280200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 166841 + ... + 168020.

It is an arithmetic number, because the mean of its divisors is an integer number (22603185).

Almost surely, 2^197567990 is an apocalyptic number.

197567990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

197567990 is a deficient number, since it is larger than the sum of its proper divisors (164082970).

197567990 is a wasteful number, since it uses less digits than its factorization.

197567990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334927.

The product of its (nonzero) digits is 1071630, while the sum is 53.

The square root of 197567990 is about 14055.8880900497. Note that the first 3 decimals coincide. The cubic root of 197567990 is about 582.4234606280.

The spelling of 197567990 in words is "one hundred ninety-seven million, five hundred sixty-seven thousand, nine hundred ninety".