197508026489 has 4 divisors (see below), whose sum is σ = 198649691556. Its totient is φ = 196366361424.

The previous prime is 197508026447. The next prime is 197508026503. The reversal of 197508026489 is 984620805791.

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

It can be written as a sum of positive squares in 2 ways, for example, as 182995728400 + 14512298089 = 427780^2 + 120467^2 .

It is a cyclic number.

It is not a de Polignac number, because 197508026489 - 2²⁴ = 197491249273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197508026189) 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, 570832274 + ... + 570832619.

It is an arithmetic number, because the mean of its divisors is an integer number (49662422889).

Almost surely, 2^197508026489 is an apocalyptic number.

It is an amenable number.

197508026489 is a deficient number, since it is larger than the sum of its proper divisors (1141665067).

197508026489 is a wasteful number, since it uses less digits than its factorization.

197508026489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1141665066.

The product of its (nonzero) digits is 8709120, while the sum is 59.

The spelling of 197508026489 in words is "one hundred ninety-seven billion, five hundred eight million, twenty-six thousand, four hundred eighty-nine".