197071791 has 16 divisors (see below), whose sum is σ = 310656000. Its totient is φ = 108728928.

The previous prime is 197071759. The next prime is 197071793. The reversal of 197071791 is 197170791.

It is not a de Polignac number, because 197071791 - 2⁵ = 197071759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197071793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161191 + ... + 162408.

It is an arithmetic number, because the mean of its divisors is an integer number (19416000).

Almost surely, 2^197071791 is an apocalyptic number.

197071791 is a deficient number, since it is larger than the sum of its proper divisors (113584209).

197071791 is a wasteful number, since it uses less digits than its factorization.

197071791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323638.

The product of its (nonzero) digits is 27783, while the sum is 42.

The square root of 197071791 is about 14038.2260631463. The cubic root of 197071791 is about 581.9354594767.

The spelling of 197071791 in words is "one hundred ninety-seven million, seventy-one thousand, seven hundred ninety-one".