148947389 has 2 divisors, whose sum is σ = 148947390. Its totient is φ = 148947388.

The previous prime is 148947367. The next prime is 148947391. The reversal of 148947389 is 983749841.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141967225 + 6980164 = 11915^2 + 2642^2 .

It is a cyclic number.

It is not a de Polignac number, because 148947389 - 2¹² = 148943293 is a prime.

It is a super-3 number, since 3×148947389³ (a number of 25 digits) contains 333 as substring.

Together with 148947391, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 148947389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (148947349) 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, 74473694 + 74473695.

It is an arithmetic number, because the mean of its divisors is an integer number (74473695).

Almost surely, 2^148947389 is an apocalyptic number.

It is an amenable number.

148947389 is a deficient number, since it is larger than the sum of its proper divisors (1).

148947389 is an equidigital number, since it uses as much as digits as its factorization.

148947389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1741824, while the sum is 53.

The square root of 148947389 is about 12204.4003949395. The cubic root of 148947389 is about 530.0835147853.

The spelling of 148947389 in words is "one hundred forty-eight million, nine hundred forty-seven thousand, three hundred eighty-nine".