147428549 has 4 divisors (see below), whose sum is σ = 147789420. Its totient is φ = 147067680.

The previous prime is 147428513. The next prime is 147428569. The reversal of 147428549 is 945824741.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 945824741 = 23497 ⋅40253.

It can be written as a sum of positive squares in 2 ways, for example, as 53919649 + 93508900 = 7343^2 + 9670^2 .

It is a cyclic number.

It is not a de Polignac number, because 147428549 - 2²⁰ = 146379973 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 (147428509) 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, 179822 + ... + 180639.

It is an arithmetic number, because the mean of its divisors is an integer number (36947355).

Almost surely, 2^147428549 is an apocalyptic number.

It is an amenable number.

147428549 is a deficient number, since it is larger than the sum of its proper divisors (360871).

147428549 is an equidigital number, since it uses as much as digits as its factorization.

147428549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360870.

The product of its digits is 322560, while the sum is 44.

The square root of 147428549 is about 12142.0158540499. The cubic root of 147428549 is about 528.2755737879.

The spelling of 147428549 in words is "one hundred forty-seven million, four hundred twenty-eight thousand, five hundred forty-nine".