148189469 has 2 divisors, whose sum is σ = 148189470. Its totient is φ = 148189468.

The previous prime is 148189421. The next prime is 148189471. The reversal of 148189469 is 964981841.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81685444 + 66504025 = 9038^2 + 8155^2 .

It is an emirp because it is prime and its reverse (964981841) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-148189469 is a prime.

It is a super-2 number, since 2×148189469² = 43920237445003922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 148189471, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (148189409) 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, 74094734 + 74094735.

It is an arithmetic number, because the mean of its divisors is an integer number (74094735).

Almost surely, 2^148189469 is an apocalyptic number.

It is an amenable number.

148189469 is a deficient number, since it is larger than the sum of its proper divisors (1).

148189469 is an equidigital number, since it uses as much as digits as its factorization.

148189469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 50.

The square root of 148189469 is about 12173.3096978595. The cubic root of 148189469 is about 529.1828739892.

The spelling of 148189469 in words is "one hundred forty-eight million, one hundred eighty-nine thousand, four hundred sixty-nine".