147431509 has 8 divisors (see below), whose sum is σ = 148548312. Its totient is φ = 146319360.

The previous prime is 147431483. The next prime is 147431513. The reversal of 147431509 is 905134741.

It can be written as a sum of positive squares in 4 ways, for example, as 27857284 + 119574225 = 5278^2 + 10935^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 147431509 - 2¹¹ = 147429461 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 (147431539) 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 7 ways as a sum of consecutive naturals, for example, 84207 + ... + 85939.

It is an arithmetic number, because the mean of its divisors is an integer number (18568539).

Almost surely, 2^147431509 is an apocalyptic number.

It is an amenable number.

147431509 is a deficient number, since it is larger than the sum of its proper divisors (1116803).

147431509 is a wasteful number, since it uses less digits than its factorization.

147431509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2327.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 147431509 is about 12142.1377442360. The cubic root of 147431509 is about 528.2791092525.

The spelling of 147431509 in words is "one hundred forty-seven million, four hundred thirty-one thousand, five hundred nine".