147308521 has 2 divisors, whose sum is σ = 147308522. Its totient is φ = 147308520.

The previous prime is 147308509. The next prime is 147308561. The reversal of 147308521 is 125803741.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77352025 + 69956496 = 8795^2 + 8364^2 .

It is a cyclic number.

It is not a de Polignac number, because 147308521 - 2⁵ = 147308489 is a prime.

It is not a weakly prime, because it can be changed into another prime (147308561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73654260 + 73654261.

It is an arithmetic number, because the mean of its divisors is an integer number (73654261).

Almost surely, 2^147308521 is an apocalyptic number.

It is an amenable number.

147308521 is a deficient number, since it is larger than the sum of its proper divisors (1).

147308521 is an equidigital number, since it uses as much as digits as its factorization.

147308521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 147308521 is about 12137.0721757762. The cubic root of 147308521 is about 528.1321708164.

The spelling of 147308521 in words is "one hundred forty-seven million, three hundred eight thousand, five hundred twenty-one".