147992579281 has 4 divisors (see below), whose sum is σ = 153095771700. Its totient is φ = 142889386864.

The previous prime is 147992579269. The next prime is 147992579303. The reversal of 147992579281 is 182975299741.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 119290798225 + 28701781056 = 345385^2 + 169416^2 .

It is a cyclic number.

It is not a de Polignac number, because 147992579281 - 2⁷ = 147992579153 is a prime.

It is a super-2 number, since 2×147992579281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (147992570281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2551596166 + ... + 2551596223.

It is an arithmetic number, because the mean of its divisors is an integer number (38273942925).

Almost surely, 2^147992579281 is an apocalyptic number.

It is an amenable number.

147992579281 is a deficient number, since it is larger than the sum of its proper divisors (5103192419).

147992579281 is an equidigital number, since it uses as much as digits as its factorization.

147992579281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5103192418.

The product of its digits is 22861440, while the sum is 64.

The spelling of 147992579281 in words is "one hundred forty-seven billion, nine hundred ninety-two million, five hundred seventy-nine thousand, two hundred eighty-one".