147108721 has 2 divisors, whose sum is σ = 147108722. Its totient is φ = 147108720.

The previous prime is 147108679. The next prime is 147108727. The reversal of 147108721 is 127801741.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126315121 + 20793600 = 11239^2 + 4560^2 .

It is a cyclic number.

It is not a de Polignac number, because 147108721 - 2⁷ = 147108593 is a prime.

It is not a weakly prime, because it can be changed into another prime (147108727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73554360 + 73554361.

It is an arithmetic number, because the mean of its divisors is an integer number (73554361).

Almost surely, 2^147108721 is an apocalyptic number.

It is an amenable number.

147108721 is a deficient number, since it is larger than the sum of its proper divisors (1).

147108721 is an equidigital number, since it uses as much as digits as its factorization.

147108721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3136, while the sum is 31.

The square root of 147108721 is about 12128.8384027490. The cubic root of 147108721 is about 527.8932877107.

The spelling of 147108721 in words is "one hundred forty-seven million, one hundred eight thousand, seven hundred twenty-one".