197090881 has 8 divisors (see below), whose sum is σ = 216768384. Its totient is φ = 178058640.

The previous prime is 197090867. The next prime is 197090891. The reversal of 197090881 is 188090791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 197090881 - 2⁵ = 197090849 is a prime.

It is a super-2 number, since 2×197090881² = 77689630746712322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197090891) by changing a digit.

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, 160675 + ... + 161896.

It is an arithmetic number, because the mean of its divisors is an integer number (27096048).

Almost surely, 2^197090881 is an apocalyptic number.

It is an amenable number.

197090881 is a deficient number, since it is larger than the sum of its proper divisors (19677503).

197090881 is a wasteful number, since it uses less digits than its factorization.

197090881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322631.

The product of its (nonzero) digits is 36288, while the sum is 43.

The square root of 197090881 is about 14038.9059758943. The cubic root of 197090881 is about 581.9542492270.

The spelling of 197090881 in words is "one hundred ninety-seven million, ninety thousand, eight hundred eighty-one".