147928969 has 2 divisors, whose sum is σ = 147928970. Its totient is φ = 147928968.

The previous prime is 147928919. The next prime is 147929009. The reversal of 147928969 is 969829741.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88454025 + 59474944 = 9405^2 + 7712^2 .

It is an emirp because it is prime and its reverse (969829741) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 147928969 - 2⁷ = 147928841 is a prime.

It is a super-2 number, since 2×147928969² = 43765959738805922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (147928919) 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, 73964484 + 73964485.

It is an arithmetic number, because the mean of its divisors is an integer number (73964485).

Almost surely, 2^147928969 is an apocalyptic number.

It is an amenable number.

147928969 is a deficient number, since it is larger than the sum of its proper divisors (1).

147928969 is an equidigital number, since it uses as much as digits as its factorization.

147928969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 55.

The square root of 147928969 is about 12162.6053541172. The cubic root of 147928969 is about 528.8726112905.

The spelling of 147928969 in words is "one hundred forty-seven million, nine hundred twenty-eight thousand, nine hundred sixty-nine".