197021089 has 16 divisors (see below), whose sum is σ = 215470080. Its totient is φ = 179459280.

The previous prime is 197021081. The next prime is 197021107. The reversal of 197021089 is 980120791.

It is a cyclic number.

It is not a de Polignac number, because 197021089 - 2³ = 197021081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (197021081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97362 + ... + 99364.

It is an arithmetic number, because the mean of its divisors is an integer number (13466880).

Almost surely, 2^197021089 is an apocalyptic number.

197021089 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

197021089 is a deficient number, since it is larger than the sum of its proper divisors (18448991).

197021089 is a wasteful number, since it uses less digits than its factorization.

197021089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2220.

The product of its (nonzero) digits is 9072, while the sum is 37.

The square root of 197021089 is about 14036.4200920320. The cubic root of 197021089 is about 581.8855490317.

The spelling of 197021089 in words is "one hundred ninety-seven million, twenty-one thousand, eighty-nine".