197432887 has 4 divisors (see below), whose sum is σ = 197486856. Its totient is φ = 197378920.

The previous prime is 197432867. The next prime is 197432891. The reversal of 197432887 is 788234791.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 197432887 - 2²³ = 189044279 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 197432887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197432867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21064 + ... + 28957.

It is an arithmetic number, because the mean of its divisors is an integer number (49371714).

Almost surely, 2^197432887 is an apocalyptic number.

197432887 is a deficient number, since it is larger than the sum of its proper divisors (53969).

197432887 is an equidigital number, since it uses as much as digits as its factorization.

197432887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53968.

The product of its digits is 677376, while the sum is 49.

The square root of 197432887 is about 14051.0813462879. The cubic root of 197432887 is about 582.2906707298.

The spelling of 197432887 in words is "one hundred ninety-seven million, four hundred thirty-two thousand, eight hundred eighty-seven".