197072455 has 4 divisors (see below), whose sum is σ = 236486952. Its totient is φ = 157657960.

The previous prime is 197072453. The next prime is 197072501. The reversal of 197072455 is 554270791.

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

It is not a de Polignac number, because 197072455 - 2¹ = 197072453 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197072453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19707241 + ... + 19707250.

It is an arithmetic number, because the mean of its divisors is an integer number (59121738).

Almost surely, 2^197072455 is an apocalyptic number.

197072455 is a deficient number, since it is larger than the sum of its proper divisors (39414497).

197072455 is an equidigital number, since it uses as much as digits as its factorization.

197072455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39414496.

The product of its (nonzero) digits is 88200, while the sum is 40.

The square root of 197072455 is about 14038.2497128381. The cubic root of 197072455 is about 581.9361130536.

The spelling of 197072455 in words is "one hundred ninety-seven million, seventy-two thousand, four hundred fifty-five".