147228197 has 4 divisors (see below), whose sum is σ = 149641836. Its totient is φ = 144814560.

The previous prime is 147228167. The next prime is 147228229. The reversal of 147228197 is 791822741.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 791822741 = 5639 ⋅140419.

It can be written as a sum of positive squares in 2 ways, for example, as 47348161 + 99880036 = 6881^2 + 9994^2 .

It is a cyclic number.

It is not a de Polignac number, because 147228197 - 2¹⁰ = 147227173 is a prime.

It is a super-2 number, since 2×147228197² = 43352283983741618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147228127) 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 in 3 ways as a sum of consecutive naturals, for example, 1206728 + ... + 1206849.

It is an arithmetic number, because the mean of its divisors is an integer number (37410459).

Almost surely, 2^147228197 is an apocalyptic number.

It is an amenable number.

147228197 is a deficient number, since it is larger than the sum of its proper divisors (2413639).

147228197 is an equidigital number, since it uses as much as digits as its factorization.

147228197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2413638.

The product of its digits is 56448, while the sum is 41.

The square root of 147228197 is about 12133.7626892897. The cubic root of 147228197 is about 528.0361605266.

The spelling of 147228197 in words is "one hundred forty-seven million, two hundred twenty-eight thousand, one hundred ninety-seven".