147442189 has 2 divisors, whose sum is σ = 147442190. Its totient is φ = 147442188.

The previous prime is 147442187. The next prime is 147442201. The reversal of 147442189 is 981244741.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140232964 + 7209225 = 11842^2 + 2685^2 .

It is an emirp because it is prime and its reverse (981244741) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 147442189 - 2¹ = 147442187 is a prime.

It is a super-2 number, since 2×147442189² = 43478398194223442, which contains 22 as substring.

Together with 147442187, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (147442187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73721094 + 73721095.

It is an arithmetic number, because the mean of its divisors is an integer number (73721095).

Almost surely, 2^147442189 is an apocalyptic number.

It is an amenable number.

147442189 is a deficient number, since it is larger than the sum of its proper divisors (1).

147442189 is an equidigital number, since it uses as much as digits as its factorization.

147442189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 40.

The square root of 147442189 is about 12142.5775270327. The cubic root of 147442189 is about 528.2918651975.

The spelling of 147442189 in words is "one hundred forty-seven million, four hundred forty-two thousand, one hundred eighty-nine".