197690 has 16 divisors (see below), whose sum is σ = 363528. Its totient is φ = 77376.

The previous prime is 197689. The next prime is 197699. The reversal of 197690 is 96791.

It can be written as a sum of positive squares in 4 ways, for example, as 177241 + 20449 = 421^2 + 143^2 .

It is a super-2 number, since 2×197690² = 78162672200, which contains 22 as substring.

It is a plaindrome in base 11.

It is a zygodrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (197699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 344 + ... + 716.

2¹⁹⁷⁶⁹⁰ is an apocalyptic number.

197690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

197690 is a deficient number, since it is larger than the sum of its proper divisors (165838).

197690 is a wasteful number, since it uses less digits than its factorization.

197690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 197690 is about 444.6234361794. The cubic root of 197690 is about 58.2543329680.

The spelling of 197690 in words is "one hundred ninety-seven thousand, six hundred ninety".