197681960487 has 32 divisors (see below), whose sum is σ = 289277485056. Its totient is φ = 119084374400.

The previous prime is 197681960467. The next prime is 197681960491. The reversal of 197681960487 is 784069186791.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 197681960487 - 2²⁷ = 197547742759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197681960467) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3676537 + ... + 3729917.

It is an arithmetic number, because the mean of its divisors is an integer number (9039921408).

Almost surely, 2^197681960487 is an apocalyptic number.

197681960487 is a deficient number, since it is larger than the sum of its proper divisors (91595524569).

197681960487 is a wasteful number, since it uses less digits than its factorization.

197681960487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54071.

The product of its (nonzero) digits is 36578304, while the sum is 66.

The spelling of 197681960487 in words is "one hundred ninety-seven billion, six hundred eighty-one million, nine hundred sixty thousand, four hundred eighty-seven".