147984509 has 2 divisors, whose sum is σ = 147984510. Its totient is φ = 147984508.

The previous prime is 147984479. The next prime is 147984511. The reversal of 147984509 is 905489741.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92064025 + 55920484 = 9595^2 + 7478^2 .

It is a cyclic number.

It is not a de Polignac number, because 147984509 - 2¹⁶ = 147918973 is a prime.

Together with 147984511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (147989509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73992254 + 73992255.

It is an arithmetic number, because the mean of its divisors is an integer number (73992255).

Almost surely, 2^147984509 is an apocalyptic number.

It is an amenable number.

147984509 is a deficient number, since it is larger than the sum of its proper divisors (1).

147984509 is an equidigital number, since it uses as much as digits as its factorization.

147984509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 147984509 is about 12164.8883677574. Note that the first 3 decimals coincide. The cubic root of 147984509 is about 528.9387914977.

The spelling of 147984509 in words is "one hundred forty-seven million, nine hundred eighty-four thousand, five hundred nine".