197996121 has 12 divisors (see below), whose sum is σ = 298429248. Its totient is φ = 126258264.

The previous prime is 197996119. The next prime is 197996147. The reversal of 197996121 is 121699791.

It is not a de Polignac number, because 197996121 - 2¹ = 197996119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (197996111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 478045 + ... + 478458.

It is an arithmetic number, because the mean of its divisors is an integer number (24869104).

Almost surely, 2^197996121 is an apocalyptic number.

It is an amenable number.

197996121 is a deficient number, since it is larger than the sum of its proper divisors (100433127).

197996121 is a wasteful number, since it uses less digits than its factorization.

197996121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956532 (or 956529 counting only the distinct ones).

The product of its digits is 61236, while the sum is 45.

The square root of 197996121 is about 14071.1094445321. The cubic root of 197996121 is about 582.8438621284.

The spelling of 197996121 in words is "one hundred ninety-seven million, nine hundred ninety-six thousand, one hundred twenty-one".