147198391 has 4 divisors (see below), whose sum is σ = 147228984. Its totient is φ = 147167800.

The previous prime is 147198383. The next prime is 147198439. The reversal of 147198391 is 193891741.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 193891741 = 373 ⋅519817.

It is a cyclic number.

It is not a de Polignac number, because 147198391 - 2³ = 147198383 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 (147198341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6325 + ... + 18286.

It is an arithmetic number, because the mean of its divisors is an integer number (36807246).

Almost surely, 2^147198391 is an apocalyptic number.

147198391 is a deficient number, since it is larger than the sum of its proper divisors (30593).

147198391 is an equidigital number, since it uses as much as digits as its factorization.

147198391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30592.

The product of its digits is 54432, while the sum is 43.

The square root of 147198391 is about 12132.5344013524. The cubic root of 147198391 is about 528.0005248981. Note that the first 3 decimals are identical.

The spelling of 147198391 in words is "one hundred forty-seven million, one hundred ninety-eight thousand, three hundred ninety-one".