197981099 has 8 divisors (see below), whose sum is σ = 209790000. Its totient is φ = 186190336.

The previous prime is 197981093. The next prime is 197981107. The reversal of 197981099 is 990189791.

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 197981099 - 2⁸ = 197980843 is a prime.

It is a super-2 number, since 2×197981099² = 78393031122495602, 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 197981099.

It is not an unprimeable number, because it can be changed into a prime (197981093) 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, 22652 + ... + 30150.

It is an arithmetic number, because the mean of its divisors is an integer number (26223750).

Almost surely, 2^197981099 is an apocalyptic number.

197981099 is a deficient number, since it is larger than the sum of its proper divisors (11808901).

197981099 is a wasteful number, since it uses less digits than its factorization.

197981099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9069.

The product of its (nonzero) digits is 367416, while the sum is 53.

The square root of 197981099 is about 14070.5756456515. The cubic root of 197981099 is about 582.8291216007.

The spelling of 197981099 in words is "one hundred ninety-seven million, nine hundred eighty-one thousand, ninety-nine".