147047521 has 2 divisors, whose sum is σ = 147047522. Its totient is φ = 147047520.

The previous prime is 147047489. The next prime is 147047543. The reversal of 147047521 is 125740741.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102010000 + 45037521 = 10100^2 + 6711^2 .

It is a cyclic number.

It is not a de Polignac number, because 147047521 - 2⁵ = 147047489 is a prime.

It is not a weakly prime, because it can be changed into another prime (147047921) 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 as a sum of consecutive naturals, namely, 73523760 + 73523761.

It is an arithmetic number, because the mean of its divisors is an integer number (73523761).

Almost surely, 2^147047521 is an apocalyptic number.

It is an amenable number.

147047521 is a deficient number, since it is larger than the sum of its proper divisors (1).

147047521 is an equidigital number, since it uses as much as digits as its factorization.

147047521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 147047521 is about 12126.3152276361. The cubic root of 147047521 is about 527.8200730385.

The spelling of 147047521 in words is "one hundred forty-seven million, forty-seven thousand, five hundred twenty-one".