197528642 has 4 divisors (see below), whose sum is σ = 296292966. Its totient is φ = 98764320.

The previous prime is 197528641. The next prime is 197528659. The reversal of 197528642 is 246825791.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 194072761 + 3455881 = 13931^2 + 1859^2 .

It is a junction number, because it is equal to n+sod(n) for n = 197528593 and 197528602.

It is not an unprimeable number, because it can be changed into a prime (197528641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49382159 + ... + 49382162.

Almost surely, 2^197528642 is an apocalyptic number.

197528642 is a deficient number, since it is larger than the sum of its proper divisors (98764324).

197528642 is an equidigital number, since it uses as much as digits as its factorization.

197528642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98764323.

The product of its digits is 241920, while the sum is 44.

The square root of 197528642 is about 14054.4883222407. The cubic root of 197528642 is about 582.3847925558.

The spelling of 197528642 in words is "one hundred ninety-seven million, five hundred twenty-eight thousand, six hundred forty-two".