147728919 has 32 divisors (see below), whose sum is σ = 222179328. Its totient is φ = 86688000.

The previous prime is 147728909. The next prime is 147728939. The reversal of 147728919 is 919827741.

It is not a de Polignac number, because 147728919 - 2¹¹ = 147726871 is a prime.

It is a super-2 number, since 2×147728919² = 43647667017817122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147728909) 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 31 ways as a sum of consecutive naturals, for example, 84979 + ... + 86699.

It is an arithmetic number, because the mean of its divisors is an integer number (6943104).

Almost surely, 2^147728919 is an apocalyptic number.

147728919 is a deficient number, since it is larger than the sum of its proper divisors (74450409).

147728919 is a wasteful number, since it uses less digits than its factorization.

147728919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1839.

The product of its digits is 254016, while the sum is 48.

The square root of 147728919 is about 12154.3785937414. The cubic root of 147728919 is about 528.6340988581.

The spelling of 147728919 in words is "one hundred forty-seven million, seven hundred twenty-eight thousand, nine hundred nineteen".