197110981 has 8 divisors (see below), whose sum is σ = 200145600. Its totient is φ = 194083680.

The previous prime is 197110967. The next prime is 197110993. The reversal of 197110981 is 189011791.

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 197110981 - 2²⁷ = 62893253 is a prime.

It is a super-2 number, since 2×197110981² = 77705477661564722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 197110981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197110961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78930 + ... + 81388.

It is an arithmetic number, because the mean of its divisors is an integer number (25018200).

Almost surely, 2^197110981 is an apocalyptic number.

It is an amenable number.

197110981 is a deficient number, since it is larger than the sum of its proper divisors (3034619).

197110981 is a wasteful number, since it uses less digits than its factorization.

197110981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3659.

The product of its (nonzero) digits is 4536, while the sum is 37.

The square root of 197110981 is about 14039.6218253912. The cubic root of 197110981 is about 581.9740317806.

The spelling of 197110981 in words is "one hundred ninety-seven million, one hundred ten thousand, nine hundred eighty-one".