197071647 has 16 divisors (see below), whose sum is σ = 267017472. Its totient is φ = 129261440.

The previous prime is 197071643. The next prime is 197071669. The reversal of 197071647 is 746170791.

It is a cyclic number.

It is not a de Polignac number, because 197071647 - 2² = 197071643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 197071599 and 197071608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197071643) 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, 201223 + ... + 202199.

It is an arithmetic number, because the mean of its divisors is an integer number (16688592).

Almost surely, 2^197071647 is an apocalyptic number.

197071647 is a deficient number, since it is larger than the sum of its proper divisors (69945825).

197071647 is an equidigital number, since it uses as much as digits as its factorization.

197071647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1998.

The product of its (nonzero) digits is 74088, while the sum is 42.

The square root of 197071647 is about 14038.2209342922. The cubic root of 197071647 is about 581.9353177369.

The spelling of 197071647 in words is "one hundred ninety-seven million, seventy-one thousand, six hundred forty-seven".