197477649 has 16 divisors (see below), whose sum is σ = 294503040. Its totient is φ = 130777200.

The previous prime is 197477641. The next prime is 197477669. The reversal of 197477649 is 946774791.

It is not a de Polignac number, because 197477649 - 2³ = 197477641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 197477595 and 197477604.

It is not an unprimeable number, because it can be changed into a prime (197477641) 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, 20142 + ... + 28295.

It is an arithmetic number, because the mean of its divisors is an integer number (18406440).

Almost surely, 2^197477649 is an apocalyptic number.

It is an amenable number.

197477649 is a deficient number, since it is larger than the sum of its proper divisors (97025391).

197477649 is a wasteful number, since it uses less digits than its factorization.

197477649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48597 (or 48591 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 54.

The square root of 197477649 is about 14052.6740871622. The cubic root of 197477649 is about 582.3346730671.

The spelling of 197477649 in words is "one hundred ninety-seven million, four hundred seventy-seven thousand, six hundred forty-nine".