147720257609 has 2 divisors, whose sum is σ = 147720257610. Its totient is φ = 147720257608.

The previous prime is 147720257603. The next prime is 147720257611. The reversal of 147720257609 is 906752027741.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147650368009 + 69889600 = 384253^2 + 8360^2 .

It is a cyclic number.

It is not a de Polignac number, because 147720257609 - 2⁴ = 147720257593 is a prime.

Together with 147720257611, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (147720257603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73860128804 + 73860128805.

It is an arithmetic number, because the mean of its divisors is an integer number (73860128805).

Almost surely, 2^147720257609 is an apocalyptic number.

It is an amenable number.

147720257609 is a deficient number, since it is larger than the sum of its proper divisors (1).

147720257609 is an equidigital number, since it uses as much as digits as its factorization.

147720257609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1481760, while the sum is 50.

The spelling of 147720257609 in words is "one hundred forty-seven billion, seven hundred twenty million, two hundred fifty-seven thousand, six hundred nine".