197542971 has 12 divisors (see below), whose sum is σ = 288166320. Its totient is φ = 130390800.

The previous prime is 197542951. The next prime is 197542987. The reversal of 197542971 is 179245791.

197542971 is a `hidden beast` number, since 19 + 7 + 542 + 97 + 1 = 666.

197542971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 197542971 - 2²³ = 189154363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (197542901) 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, 107751 + ... + 109568.

It is an arithmetic number, because the mean of its divisors is an integer number (24013860).

Almost surely, 2^197542971 is an apocalyptic number.

197542971 is a deficient number, since it is larger than the sum of its proper divisors (90623349).

197542971 is a wasteful number, since it uses less digits than its factorization.

197542971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217426 (or 217423 counting only the distinct ones).

The product of its digits is 158760, while the sum is 45.

The square root of 197542971 is about 14054.9980789753. The cubic root of 197542971 is about 582.3988745472.

The spelling of 197542971 in words is "one hundred ninety-seven million, five hundred forty-two thousand, nine hundred seventy-one".