197431764 has 12 divisors (see below), whose sum is σ = 460674144. Its totient is φ = 65810584.

The previous prime is 197431753. The next prime is 197431783. The reversal of 197431764 is 467134791.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8226312 + ... + 8226335.

It is an arithmetic number, because the mean of its divisors is an integer number (38389512).

Almost surely, 2^197431764 is an apocalyptic number.

It is an amenable number.

197431764 is an abundant number, since it is smaller than the sum of its proper divisors (263242380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

197431764 is a wasteful number, since it uses less digits than its factorization.

197431764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16452654 (or 16452652 counting only the distinct ones).

The product of its digits is 127008, while the sum is 42.

The square root of 197431764 is about 14051.0413848939. The cubic root of 197431764 is about 582.2895667029.

The spelling of 197431764 in words is "one hundred ninety-seven million, four hundred thirty-one thousand, seven hundred sixty-four".