197498855 has 4 divisors (see below), whose sum is σ = 236998632. Its totient is φ = 157999080.

The previous prime is 197498839. The next prime is 197498857. The reversal of 197498855 is 558894791.

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

It is not a de Polignac number, because 197498855 - 2⁴ = 197498839 is a prime.

It is a super-2 number, since 2×197498855² = 78011595452622050, which contains 22 as substring.

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 197498855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197498857) 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, 19749881 + ... + 19749890.

It is an arithmetic number, because the mean of its divisors is an integer number (59249658).

Almost surely, 2^197498855 is an apocalyptic number.

197498855 is a deficient number, since it is larger than the sum of its proper divisors (39499777).

197498855 is an equidigital number, since it uses as much as digits as its factorization.

197498855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39499776.

The product of its digits is 3628800, while the sum is 56.

The square root of 197498855 is about 14053.4285852243. The cubic root of 197498855 is about 582.3555168556.

The spelling of 197498855 in words is "one hundred ninety-seven million, four hundred ninety-eight thousand, eight hundred fifty-five".