147628309 has 4 divisors (see below), whose sum is σ = 155398240. Its totient is φ = 139858380.

The previous prime is 147628307. The next prime is 147628333. The reversal of 147628309 is 903826741.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 903826741 = 197 ⋅4587953.

It is a cyclic number.

It is not a de Polignac number, because 147628309 - 2¹ = 147628307 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 (147628301) 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 3 ways as a sum of consecutive naturals, for example, 3884937 + ... + 3884974.

It is an arithmetic number, because the mean of its divisors is an integer number (38849560).

Almost surely, 2^147628309 is an apocalyptic number.

147628309 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

147628309 is a deficient number, since it is larger than the sum of its proper divisors (7769931).

147628309 is an equidigital number, since it uses as much as digits as its factorization.

147628309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7769930.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 147628309 is about 12150.2390511463. The cubic root of 147628309 is about 528.5140637839.

The spelling of 147628309 in words is "one hundred forty-seven million, six hundred twenty-eight thousand, three hundred nine".