198524605397 has 4 divisors (see below), whose sum is σ = 198560857836. Its totient is φ = 198488352960.

The previous prime is 198524605387. The next prime is 198524605423. The reversal of 198524605397 is 793506425891.

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 2 ways, for example, as 198380269201 + 144336196 = 445399^2 + 12014^2 .

It is a cyclic number.

It is not a de Polignac number, because 198524605397 - 2¹⁰ = 198524604373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198524605387) 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, 18118004 + ... + 18128957.

It is an arithmetic number, because the mean of its divisors is an integer number (49640214459).

It is a 1-persistent number, because it is pandigital, but 2⋅198524605397 = 397049210794 is not.

Almost surely, 2^198524605397 is an apocalyptic number.

It is an amenable number.

198524605397 is a deficient number, since it is larger than the sum of its proper divisors (36252439).

198524605397 is an equidigital number, since it uses as much as digits as its factorization.

198524605397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36252438.

The product of its (nonzero) digits is 16329600, while the sum is 59.

The spelling of 198524605397 in words is "one hundred ninety-eight billion, five hundred twenty-four million, six hundred five thousand, three hundred ninety-seven".